"Not Snow Nor Rain" by Miriam Allen De Ford is a science fiction story written in the late 1950s. The narrative follows Sam Wilson, a dedicated mail carrier, on his last day of work before retirement as he becomes embroiled in a mysterious situation involving undelivered letters to a nonexistent address. The book delves into themes of curiosity, the mundane versus the extraordinary, and the implications of extraterrestrial life—a topic that resonates with Wilson's passion for science fiction. The story begins with Sam Wilson reflecting on his impending retirement from his job as a postman. During his last delivery, he encounters a series of letters addressed to "Orville K. Hesterson, Time-Between-Time," which he is unable to deliver due to the strange address. After retirement, his obsession with these undeliverable letters leads him down a rabbit hole of investigation, culminating in a confrontation with Hesterson, who reveals himself to be an alien scout gathering information for an impending invasion of Earth. The tale combines elements of intrigue and humor as Wilson navigates this bizarre situation, ultimately finding himself ensnared in a much larger cosmic scheme than he had ever anticipated. (This is an automatically generated summary.)