“I was only six years old when they dropped the atomic bomb on Hiroshima, so anything I remember about that day other people have helped me to remember.

“I remember I was playing on the living-room carpet outside my father’s study door in Ilium, New York. The door was open, and I could see my father. He was wearing pajamas and a bathrobe. He was smoking a cigar. He was playing with a loop of string. Father was staying home from the laboratory in his pajamas all day that day. He stayed home whenever he wanted to.

“Father, as you probably know, spent practically his whole professional life working for the Research Laboratory of the General Forge and Foundry Company in Ilium. When the Manhattan Project came along, the bomb project, Father wouldn’t leave Ilium to work on it. He said he wouldn’t work on it at all unless they let him work where he wanted to work. A lot of the time that meant at home. The only place he liked to go, outside of Ilium, was our cottage on Cape Cod. Cape Cod was where he died. He died on a Christmas Eve. You probably know that, too.

“Anyway, I was playing on the carpet outside his study on the day of the bomb. My sister Angela tells me I used to play with little toy trucks for hours, making motor sounds, going ‘burton, burton, burton’ all the time. So I guess I was going‘ burton, burton, burton,’ on the day of the bomb; and Father was in his study, playing with a loop of string.

“It so happens I know where the string he was playing with came from. Maybe you can use it somewhere in your book. Father took the string from around the manuscript of a novel that a man in prison had sent him. The novel was about the end of the world in the year 2000, and the name of the book was 2000 A.D. It told about how mad scientists made a terrific bomb that wiped out the whole world. There was a big sex orgy when everybody knew that the world was going to end, and then Jesus Christ Himself appeared ten seconds before the bomb went off.