The original ending to the film picked up after the bomb explodes at the meeting headquarters. Forrest and Lillith are living in a cabin in the woods, and believe that they are safe thanks to Farralone. Rushing back to the cabin to warn Lillith, he sees Morgridge, who tells him that they have nothing to fear - Farralone's sacrifice has taught him that love is the solution, not destruction. This ending was cut on the request of Samuel Goldwyn, who felt that it was too contrived and that the lovers reading about it in the newspaper was a much more satisfying ending.
Often said to be adapted from "the novel The Purple Mask" by Gouverneur Morris, Morris wrote no such novel. It is in fact adapted from a novelette by Morris entitled "The Purple Flask" which was published in the September and October issues of Cosmopolitan magazine in 1917. (A novel is anything over 40,000 words. "The Purple Flask" was about eight thousand words.)
In the Turner Classic Movies Archives Lon Chaney Collection version a new soundtrack is featured. Vivek Maddala was the winner in 2000 of their Young Film Composers Competition held in conjunction with Film Music Magazine to write music for a silent movie.
Lon Chaney's character was originally called Rattavich, but the name was softened to Farralone to appease censors, who felt that the original name was too unsubtle as to the origins of the group.