Stagecoach (USA 1939), en v.f. La Chevauchée fantastique
d'après Boule de suif de Guy de Maupassant
The screenplay is an adaptation by Dudley Nichols of The Stage to Lordsburg , a short story by Ernest Haycox. The rights to Lordsburg were bought by John Ford soon after it was published in Collier's magazine on 10 April 1937. According to Thomas Schatz, Ford claimed that his inspiration in expanding Stagecoach beyond the barebones plot given in The Stage to Lordsburg was his familiarity with another short story, Boule de Suif by Guy de Maupassant. Schatz believes "this scarcely holds up to scrutiny" and argues that a more likely inspiration was Bret Harte's 1892 short story The Outcasts of Poker Flat.
Ford's statement also seems to be the basis for the claim that Haycox himself relied upon Guy de Maupassant's story. However, there appears to be no concrete evidence for Haycox actually being familiar with the earlier story, especially as he was documented as going out of his way to avoid reading the work of others that might unconsciously influence his writing, and he focused his personal reading in the area of history.
Stagecoach : origins - Wikipedia
> le film en entier en v.o. (1h35mn) : Stagecoach (1939) - YouTube
