Blinky Collins’ part in this matter was very brief. Blinky lasted just long enough to make a great discovery, to brag about it as was Blinky’s way, and then pass on to find his reward in whatever hereafter is set apart for weak-minded crooks whose heads are not hard enough to withstand the crushing impact of a lead-filled pacifier.

The photograph studio of Blinky Collins was on the third floor of a disreputable building in an equally unsavory part of Chicago. There were no tinted pictures of beautiful blondes nor of stern, square-jawed men of affairs in Blinky’s reception room. His clients, who came furtively there, were strongly opposed to having their pictures taken--they came for other purposes. For the photographic work of Mr. Collins was strictly commercial--and peculiar. There were fingerprints to be photographed and identified for purpose of private revenge, photographs of people to be merged and repictured in compromising closeness for reasons of blackmail. And even X-Ray photography was included in the scope of his work.

The great discovery came when a box was brought to the dingy room and Mr. Collins was asked to show what was inside it without the bother and inconvenience of disturbing lock and seals. The X-Ray machine sizzled above it, and a photographic plate below was developed to show a string of round discs that could easily have been pearls.

The temporary possessor of the box was pleased with the result--but Blinky was puzzled. For the developer had brought out an odd result. There were the pearls as expected, but, too, there was a small picture superimposed--a picture of a bald head and a body beneath seated beside a desk. The picture had been taken from above looking straight down, and head and desk were familiar.

Blinky knew them both. The odd part was that he knew also that both of them were at that instant on the ground floor of the same disreputable building, directly under and two floors below his workshop.

Like many great discoveries, this of Blinky’s came as the result of an accident. He had monkeyed with the X-Ray generator and had made certain substitutions. And here was the result--a bald head and a desk, photographed plainly through two heavy wood floors. Blinky scratched his own head in deep thought. And then he repeated the operation.

This time there was a blonde head close to the bald one, and two people were close to the desk and to each other. Blinky knew then that there were financial possibilities in this new line of portrait work.

It was some time before the rat eyes of the inventor were able to see exactly what they wanted through this strange device, but Blinky learned. And he fitted a telescope back of the ray and found that he could look along it and see as if through a great funnel what was transpiring blocks and blocks away; he looked where he would, and brick walls or stone were like glass when the new ray struck through them.

Blinky never knew what he had--never dreamed of the tremendous potentialities in his oscillating ethereal ray that had a range and penetration beyond anything known. But he knew, in a vague way, that this ray was a channel for light waves to follow, and he learned that he could vary the range of the ray and that whatever light was shown at the end of that range came to him as clear and distinct as if he were there in the room.

He sat for hours, staring through the telescope. He would train the device upon a building across the street, then cut down the current until the unseen vibration penetrated inside the building. If there was nothing there of interest he would gradually increase the power, and the ray would extend out and still out into other rooms and beyond them to still others. Blinky had a lot of fun, but he never forgot the practical application of the device--practical, that is, from the distorted viewpoint of a warped mind.

“I’ve heard about your machine,” said a pasty-faced man one day, as he sat in Blinky’s room, “and I think it’s a lot of hooey. But I’d give just one grand to know who is with the district attorney this minute.”

“Where is he?” asked Blinky.

“Two blocks down the street, in the station house ... and if Pokey Barnard is with him, the lousy stool-pigeon--”

Blinky paid no attention to the other’s opinion of one Pokey Barnard; he was busy with a sputtering blue light and a telescope behind a shield of heavy lead.

“Put your money on the table,” he said, finally: “there’s the dicks ... and there’s Pokey. Take a look--”

It was some few minutes later that Blinky learned of another valuable feature in his ray. He was watching the district attorney when the pasty-faced man brushed against a hanging incandescent light. There was a bit of bare wire exposed, and as it swung into the ray the fuses in the Collins studio blew out instantly.

But the squinting eyes at the telescope had seen something first. They had seen the spare form of the district attorney throw itself from the chair as if it had been dealt a blow--or had received an electric shock.

Blinky put in new fuses--heavier ones--and tried it again on another subject. And again the man at the receiving end got a shot of current that sent him sprawling.

“Now what the devil--” demanded Blinky. He stood off and looked at the machine, the wire with its 110 volts, the invisible ray that was streaming out.

“It’s insulated, the machine is,” he told his caller, “so the juice won’t shoot back if I keep my hands off; but why,” he demanded profanely, “don’t it short on the first thing it touches?”

He was picturing vaguely a ray like a big insulated cable, with light and current both traveling along a core at its center, cut off, insulated by the ray, so that only the bare end where the ray stopped could make contact.

“Some more of them damn electrons,” he hazarded; then demanded of his caller: “But am I one hell of a smart guy? Or am I?”

There was no denying this fact. The pasty-faced man told Blinky with lurid emphasis just how smart. He had seen with his own eyes and this was too good to keep.

He paid his one grand and departed, first to make certain necessary arrangements for the untimely end of one Pokey Barnard, squealer, louse, et cetera, et cetera, and then to spread the glad news through the underworld of Collins’ invention.

That was Blinky’s big mistake, as was shown a few days later. Not many had taken seriously the account of the photographer’s experiments, but there was one who had, as was evident. A bearded man, whose eyes stared somewhat wildly from beneath a shock of frowzy hair, entered the Collins work-room and locked the door behind him. His English was imperfect, but the heavy automatic in his hand could not be misunderstood. He forced the trembling inventor to give a demonstration, and the visitor’s face showed every evidence of delight.

“The cur-rent,” he demanded with careful words, “the electreek cur-rent, you shall do also. Yes?”

Again the automatic brought quick assent, and again the visitor showed his complete satisfaction. Showed it by slugging the inventor quietly and efficiently and packing the apparatus in the big suitcase he had brought.

Blinky Collins had been fond of that machine. He had found a form of television with uncounted possibilities, and it had been for him the perfect instrument of a blackmailing Peeping Tom; he had learned the secret of directed wireless transmission of power and had seen it as a means for annoying his enemies. Yet Blinky Collins--the late Blinky Collins--offered no least objection, when the bearded man walked off with the machine. His body, sprawled awkwardly in the corner, was quite dead...

And now, some two months later, in his Washington office, the Chief of the United States Secret Service pushed a paper across his desk to a waiting man and leaned back in his chair.

“What would you make of that, Del?” he asked.

Robert Delamater reached leisurely for the paper. He regarded it with sleepy, half-closed eyes.

There was a crude drawing of an eye at the top. Below was printed--not written--a message in careful, precise letters: “Take warning. The Eye of Allah is upon you. You shall instructions receive from time to time. Follow them. Obey.”

Delamater laughed. “Why ask me what I think of a nut letter like that. You’ve had plenty of them just as crazy.”

“This didn’t come to me,” said the Chief; “it was addressed to the President of the United States.”

“Well, there will be others, and we will run the poor sap down. Nothing out of the ordinary I should say.”

“That is what I thought--at first. Read this--” The big, heavy-set man pushed another and similar paper across the desk. “This one was addressed to the Secretary of State.”

Delamater did not read it at once. He held both papers to the light; his fingers touched the edges only.

“No watermark,” he mused; “ordinary white writing stock--sold in all the five and ten cent stores. Tried these for fingerprints I suppose?”.

“Read it,” suggested the Chief.

“Another picture of an eye,” said Delamater aloud, and read: “‘Warning. You are dealing with an emissary from a foreign power who is an unfriend of my country. See him no more. This is the first and last warning. The Eye of Allah watches.’

“And what is this below--? ‘He did not care for your cigars, Mr. Secretary. Next time--but there must be no next time.’”

Delamater read slowly--lazily. He seemed only slightly interested except when he came to the odd conclusion of the note. But the Chief knew Delamater and knew how that slow indolence could give place to a feverish, alert concentration when work was to be done.

“Crazy as a loon,” was the man’s conclusion as he dropped the papers upon the desk.

“Crazy,” his chief corrected, “like a fox! Read the last line again; then get this--

“The Secretary of State is meeting with a foreign agent who is here very much incog. Came in as a servant of a real ambassador. Slipped quietly into Washington, and not a soul knew he was here. He met the Secretary in a closed room; no one saw him come or leave--”;

“Well, the Secretary tells me that in that room where nobody could see he offered this man a cigar. His visitor took it, tried to smoke it, apologized--and lit one of his own vile cigarettes.”

“Hm-m!” Delamater sat a little straighter in his chair; his eyebrows were raised now in questioning astonishment. “Dictaphone? Some employee of the Department listening in?”

“Impossible.”

“Now that begins to be interesting,” the other conceded. His eyes had lost their sleepy look. “Want me to take it on?”

“Later. Right now. I want you to take this visiting gentleman under your personal charge. Here is the name and the room and hotel where he is staying. He is to meet with the Secretary to-night--he knows where. You will get to him unobserved--absolutely unseen; I can leave that to you. Take him yourself to his appointment, and take him without a brass band. But have what men you want tail you and watch out for spies ... Then, when he is through, bring him back and deliver him safely to his room. Compray?”

“Right--give me Wilkins and Smeed. I rather think I can get this bird there and back without being seen, but perhaps they may catch Allah keeping tabs on us at that.” He laughed amusedly as he took the paper with the name and address.

A waiter with pencil and order-pad might have been seen some hours later going as if from the kitchen to the ninth floor of a Washington hotel. And the same waiter, a few minutes later, was escorting a guest from a rear service-door to an inconspicuous car parked nearby. The waiter slipped behind the wheel.

A taxi, whose driver was half asleep, was parked a hundred feet behind them at the curb. As they drove away and no other sign of life was seen in the quiet street the driver of the taxi yawned ostentatiously and decided to seek a new stand. He neglected possible fares until a man he called Smeed hailed him a block farther on. They followed slowly after the first car ... and they trailed it again on its return after some hours.

“Safe as a church,” they reported to the driver of the first car. “We’ll swear that nobody was checking up on that trip.”

And: “O. K.” Delamater reported to his chief the next morning. “Put one over on this self-appointed Allah that time.”

But the Chief did not reply: he was looking at a slip of paper like those he had shown his operative the day before. He tossed it to Delamater and took up the phone.

“To the Secretary of State,” Delamater read. “You had your warning. Next time you disobey it shall be you who dies.”

The signature was only the image of an eye.

The Chief was calling a number; Delamater recognized it as that of the hotel he had visited. “Manager, please, at once,” the big man was saying.

He identified himself to the distant man. Then: “Please check up on the man in nine four seven. If he doesn’t answer, enter the room and report at once--I will hold the phone...”

The man at the desk tapped steadily with a pencil; Robert Delamater sat quietly, tensely waiting. But some sixth sense told him what the answer would be. He was not surprised when the Chief repeated what the phone had whispered.

“Dead? ... Yes! ... Leave everything absolutely undisturbed. We will be right over.”

“Get Doctor Brooks, Del,” he said quietly; “the Eye of Allah was watching after all.”

Robert Delamater was silent as they drove to the hotel. Where had he slipped? He trusted Smeed and Wilkins entirely; if they said his car had not been followed it had not. And the visitor had been disguised; he had seen to that. Then, where had this person stood--this being who called himself the Eye of Allah?

“Chief,” he said finally. “I didn’t slip--nor Wilkins or Smeed.”

“Someone did,” replied the big man, “and it wasn’t the Eye of Allah, either.”

The manager of the hotel was waiting to take them to the room. He unlocked the door with his pass key.

“Not a thing touched,” he assured the Secret Service men; “there he is, just the way we found him.”

In the doorway between the bedroom and bath a body was huddled. Doctor Brooks knelt quickly beside it. His hands worked swiftly for a moment, then he rose to his feet.

“Dead,” he announced.

“How long?” asked the Chief.

“Some time. Hours I should say--perhaps eight or ten.”

“Cause?” the query was brief.

“It will take an autopsy to determine that. There is no blood or wound to be seen.”

The doctor was again examining the partly rigid body. He opened one hand; it held a cake of soap. There was a grease mark on the hand.

Delamater supplied the explanation. “He touched some grease on the old car I was using,” he said. “Must have gone directly to wash it off. See--there is water spilled on the floor.”

Water had indeed been splashed on the tile floor of the bath room; a pool of it still remained about the heavy, foreign-looking shoes of the dead man.

Something in it caught Delamater’s eye. He leaned down to pick up three pellets of metal, like small shot, round and shining.

“I’ll keep these,” he said, “though the man was never killed with shot as small as that.”

“We shall have to wait for the autopsy report,” said the Chief crisply; “that may give the cause of death. Was there anyone in the room--did you enter it with him last night, Del?”

“No,” said the operative; “he was very much agitated when we got here--dismissed me rather curtly at the door. He was quite upset about something--spoke English none too well and said something about a warning and damned our Secret Service as inefficient.”

“A warning!” said the Chief. The dead man’s brief case was on the bed. He crossed to it and undid the straps; the topmost paper told the reason for the man’s disquiet. It showed the familiar, staring eye. And beneath the eye was a warning: this man was to die if he did not leave Washington at once.

The Chief turned to the hotel manager. “Was the door locked?”

“Yes.”

“But it is a spring lock. Someone could have gone out and closed it after him.”

“Not this time. The dead-bolt was thrown. It takes a key to do that from the outside or this thumb-turn on the inside.” The hotel man demonstrated the action of the heavy bolt.

“Then, with a duplicate key, a man could have left this room and locked the door behind him.”

“Absolutely not. The floor-clerk was on duty all night. I have questioned her: this room was under her eyes all the time. She saw this man return, saw your man, here”--and he pointed to Delamater--”leave him at the door. There was no person left the room after that.”

“See about the autopsy, Doctor,” the Chief ordered.

And to the manager: “Not a thing here must be touched. Admit only Mr. Delamater and no one else unless he vouches for them.

“Del,” he told the operative, “I’m giving you a chance to make up for last night. Go to it.”

And Robert Delamater “went to it” with all the thoroughness at his command, and with a total lack of result.

The autopsy helped not at all. The man was dead; it was apparently a natural death. “Not a scratch nor a mark on him,” was the report. But: “ ... next time it will be you,” the note with the staring eye had warned the Secretary of State. The writer of it was taking full credit for the mysterious death.

Robert Delamater had three small bits of metal, like tiny shot, and he racked his brain to connect these with the death. There were fingerprints, too, beautifully developed upon the mysterious missives--prints that tallied with none in the records. There were analyses of the paper--of the ink--and not a clue in any of them.

Just three pellets of metal. Robert Delamater had failed utterly, and he was bitter in the knowledge of his failure.

“He had you spotted, Del,” the Chief insisted. “The writer of these notes may be crazy, but he was clever enough to know that this man did see the Secretary. And he was waiting for him when he came back; then he killed him.”

“Without a mark?”

“He killed him,” the Chief repeated; “then he left--and that’s that.”

“But,” Delamater objected, “the room clerk--”

“--took a nap,” broke in the Chief. But Delamater could not be satisfied with the explanation.

“He got his, all right,” he conceded, “--got it in a locked room nine stories above the street, with no possible means of bringing it upon himself--and no way for the murderer to escape. I tell you there is something more to this: just the letter to the Secretary, as if this Eye of Allah were spying upon him--”

The Chief waved all that aside. “A clever spy,” he insisted. “Too clever for you. And a darn good guesser; he had us all fooled. But we’re dealing with a madman, not a ghost, and he didn’t sail in through a ninth story window nor go out through a locked door; neither did he spy on the Secretary of State in his private office. Don’t try to make a supernatural mystery out of a failure, Del.”

The big man’s words were tempered with a laugh, but there was an edge of sarcasm, ill-concealed.

And then came the next note. And the next. The letters were mailed at various points in and about the city; they came in a flood. And they were addressed to the President of the United States, to the Secretary of War--of the Navy--to all the Cabinet members. And all carried the same threat under the staring eye.

The United States, to this man, represented all that was tyrannical and oppressive to the downtrodden of the earth. He proposed to end it--this government first, then others in their turn. It was the outpouring of a wildly irrational mind that came to the office of the harassed Chief of the United States Secret Service, who had instructions to run this man down--this man who signed himself The Eye of Allah. And do it quickly for the notes were threatening. Official Washington, it seemed, was getting jumpy and was making caustic inquiries as to why a Secret Service department was maintained.

The Chief, himself, was directing the investigation--and getting nowhere.

“Here is the latest,” he said one morning. “Mailed at New York.” Delamater and a dozen other operatives were in his office: he showed them a letter printed like all the others. There was the eye, and beneath were words that made the readers catch their breath.

“The Eye of Allah sees--it has warned--now it will destroy. The day of judgment is at hand. The battleship Maryland is at anchor in the Hudson River at New York. No more shall it be the weapon of a despot government. It will be destroyed at twelve o’clock on September fifth.”

“Wild talk,” said the Chief, “but today is the fourth. The Commander of the Maryland has been warned--approach by air or water will be impossible. I want you men to patrol the shore and nail this man if he shows up. Lord knows what he intends--bluffing probably--but he may try some fool stunt. If he does--get him!”

Eleven-thirty by the watch on Robert Delamater’s wrist found him seated in the bow of a speed-boat the following morning. They patrolled slowly up and down the shore. There were fellow operatives, he knew, scores of them, posted at all points of vantage along the docks.

Eleven forty-five--and the roar of seaplanes came from above where air patrols were-guarding the skies. Small boats drove back and forth on set courses; no curious sight-seeing craft could approach the Maryland that day. On board the battleship, too, there was activity apparent. A bugle sounded, and the warning of bellowing Klaxons echoed across the water. Here, in the peace and safety of the big port, the great man-of-war was sounding general quarters, and a scurry of running men showed for an instant on her decks. Anti-aircraft guns swung silently upon imaginary targets--

The watcher smiled at the absurdity of it all--this preparation to repel the attack of a wild-eyed writer of insane threats. And yet--and yet-- He knew, too, there was apprehension in his frequent glances at his watch.

One minute to go! Delamater should have watched the shore. And, instead, he could not keep his eyes from the big fighting-ship silhouetted so clearly less than a mile away, motionless and waiting--waiting--for what? He saw the great turreted guns, useless against this puny, invisible opponent. Above them the fighting tops were gleaming. And above them--

Delamater shaded his eyes with a quick, tense hand: the tip of the mast was sparkling. There was a blue flash that glinted along the steel. It was gone to reappear on the fighting top itself--then lower.

What was it? the watching man was asking himself. What did it bring to mind? A street-car? A defective trolley? The zipping flash of a contact made and broken? That last!

Like the touch of a invisible wire, tremendously charged, a wire that touched and retreated, that made and lost its contact, the flashing arc was working toward the deck. It felt its way to the body of the ship; the arc was plain, starting from mid-air to hiss against the armored side; the arc shortened--went to nothing--vanished ... A puff of smoke from an open port proved its presence inside. Delamater had the conviction that a deadly something had gone through the ship’s side--was insulated from it--was searching with its blazing, arcing end for the ammunition rooms...

The realization of that creeping menace came to Delamater with a gripping, numbing horror. The seconds were almost endless as he waited. Slowly, before his terrified eyes, the deck of the great ship bulged upward ... slowly it rolled and tore apart ... a mammoth turret with sixteen-inch guns was lifting unhurriedly into the air ... there were bodies of men rocketing skyward...