In 2011 Pauline Méliès, great-great-granddaughter of the original Georges Méliès, hypothesized that the known copy to exist of "A Terrible Night" was actually a later film of the same director called "A Midnight Episode", and that a flipbook published by Leon Beaulieu around the turn of the century is a copy of the true film. If this hypothesis is correct then both films exist.
Included in the "Georges Melies: First Wizard of Cinema (1896-1913)" DVD collection, released by Flicker Alley.
Star Films #26