That the gentleman in question was a nut was beyond question. He was an institutionalized psychotic. He was nutty enough to think he could make an atom bomb out of modeling clay!
At five o'clock Ed Loyce washed up, tossed on his hat and coat, got his car out and headed across town toward his TV sales store. He was tired. His back and shoulders ached from digging dirt out of the basement and wheeling it into the back yard. But for a forty-year-old man he had done okay. Janet could get a new vase with the money he had saved; and he liked the idea of repairing the foundations himself.
After some sudden and unspecified catastrophe has depopulated England, the countryside reverts to nature, and the few survivors to a quasi-medieval way of life. The first part, The Relapse into Barbarism, is the account by some later historian of the fall of civilisation and its consequences, with a loving description of nature reclaiming England. The second part, Wild England, is an adventure set many years later in the wild landscape and society.
The conversion of light into electricity by spectrum is an interesting possibility. The idea of using foreign proteins on the human system to repel enemies, is also interesting. Do you get it? We didn't either until we read the story. Read the yarn and you'll get it too.