"The Idyll of Miss Sarah Brown" is a short story by Damon Runyon telling of the improbable—but eventually triumphant—love between an inveterate gambler (Sky Masterson) and a missionary girl (the Miss Sarah Brown of the title).
It was the basis for the musical Guys and Dolls, with a similar plot, but with many twists added before the lovers are reunited and live happily ever after.
It was first published in Collier's Weekly in 1933.
[1] In 1949, it was dramatized on radio as part of a program titled Damon Runyon Theatre.
This article about a short story (or stories) published in the 1930s is a stub.