Years ago the United States Post Office gave up searching directories and reference books, or deciphering illiterate or screwy addresses, so as to make every possible delivery. That went out with three daily and two Saturday deliveries, two-cent drop postage, and all the other amenities that a submissive public let itself lose without a protest. But there was still a city directory in the office. Sam Wilson searched it stubbornly. Time-Between-Time was not listed. Neither was Orville K. Hesterson. There was nothing to do but consider the letters nixies and turn them over to the proper department. If there was another bunch of them tomorrow, he would never know. * * * * * Retirement, after the first carefree week, was just as bad as Sam Wilson had suspected it was going to be. Not bad enough to think yet about elevator operating or night watching, but bad enough to make him restless and edgy, and to make him snap Mollie's head off until they had their first bad quarrel for years. He'd never had time enough before to keep up with all the science fiction magazines and books. Now, with nothing but time, there weren't enough of them to fill the long days. What he needed was something--something that didn't involve walking--to make those endless hours speed up. He began thinking again about those 22 nixies. He sat gloomily on a bench in Tompkins Square in the spring sunshine: just what he had sworn not to do, but if he stayed home another hour, Mollie would heave the vacuum cleaner at him. In the public library he had searched directories and phone books, for all the boroughs and for suburban New Jersey, Connecticut and Pennsylvania; Orville K. Hesterson appeared in none of them. He didn't know why it was any of his business, except that Time-Between-Time had put a blot on the very end of his 35-year record and he wanted revenge. Also, it was something to do and be interested in. In a way, science fiction and detection had a lot in common, and Sam Wilson prided himself on his ability to guess ahead what was going to happen in a story. So why couldn't he figure out this puzzle, right here in Manhattan, Terra? But he was stymied. Or was he? Sam took his gloomy thoughts to Mulligan's. Every large city is a collection of villages. The people who live long enough in a neighborhood acquire their own groceries, their own drugstores, their own bars. The Wilsons had lived six years in their flat, and Mulligan's, catercornered across the street, was Sam's personal bar. He was cautious as to what he said there. He'd heard enough backtalk already when he had been indiscreet enough once, after four beers, to express his views on UFOs. He had no desire to gain a reputation as a crackpot. But it was safe enough to remark conversationally, "How do you find out where a guy is when he says he's someplace and you write him there and the letter comes back?"