Miriam Allen DeFord's 1959 story opens with Sam Wilson, a retiring mail carrier, reflecting on the inscription from Herodotus that adorns the General Post Office: "Not snow, nor rain, nor heat, nor gloom of night stays these couriers." This motto, cribbed from Persian messengers, becomes an ironic counterpoint to the alien scheme Sam stumbles upon. The narrative grounds its science fiction premise in the mundane details of a postal worker's last route—the worn-out feet, the shabby Ochterlonie Building, the feel of envelopes containing money. DeFord uses Sam's familiarity with his rounds to make the extraordinary feel plausible.

The Postal Frame and the Alien Scheme

The story's title and opening reference to Herodotus establish a thematic tension between human dedication and alien manipulation. Sam has internalized the courier's creed, but the alien Hesterson exploits the postal system for a "softening-up process." The scheme involves a questionnaire, a $1,000 prize, and dollar book credits—all designed to gauge Earth's resistance. Hesterson admits the organization "Time-Between-Time" is a front, and the invasion is imminent. DeFord contrasts Sam's principled service with the alien's cynical use of local laws, including the insistence on genuine stamps.

Sam Wilson: A Portrait of Routine and Resistance

Sam is defined by his long career and his anxiety about retirement. He fears becoming "another discarded old man" on a park bench. His hobby as a science fiction fan—watching for flying saucers—prepares him to accept the alien encounter without panic. When he confronts Hesterson, Sam's interrogation is methodical, drawing on his knowledge of postal regulations. He notes the inconsistency of the first mailing list's postage, forcing Hesterson to admit they "had to fabricate some of your currency." Sam's physical grip on the alien's wrist mirrors his moral grip on the situation.

Alien Voice and Human Idiom

Hesterson's dialogue reveals his extraterrestrial nature through linguistic quirks. He learned English "mostly from the B.B.C." and struggles with New York idioms. He refers to his superior with a name that "sounded like a grunt" and describes his own shape as "absurd" to maintain. His explanation of time as "just a dimension of space" and the organization's name as idiomatic underscores the cultural gap. The alien's exhaustion from maintaining human form and his plaintive tone add a darkly comic layer to the threat of planetary colonization.

DeFord keeps the focus on Sam's perspective, never revealing the outcome of his discovery. Readers are left to weigh the alien's rationale—overcrowding and radiation-driven colonization—against Sam's quiet heroism. The story rewards attention to small details: the feel of envelopes, the building's decay, the alien's grunt-like name. It is a tale where the mundane becomes extraordinary, and a mail carrier's last day becomes a front-line encounter.