Raoul Walsh had just come off _The Birth of a Nation_ both as one of Griffith's assistant directors and as an actor (most prominently as John Wilkes Booth), when he made this film. In his autobiography, Walsh credits Griffith with "teaching" him not only about much of the art of fiction filmmaking, but also about production management technics that aided him in taking full advantage of many of New York City's most pictorial exterior locations.
The locations play an important role in adding to the naturalism of an otherwise highly melodramatic plot with the high society young woman turned heroine social worker (much overplayed by a major star of the 1910s, Anna Q Nilsson) and the regeneration of the one-time Lower Manhatan gang leader.
The wonder of this film is the performance of the male "star", Rockliffe Fellowes, who played in over a dozen nearly unremembered films until he died in 1950. His performance is so subtly varied and electrically alive that one is reminded of Brando in his early 1950s films. An interesting sidenote about his performance: The movieola film editing machine -- that magnified the small 35mm frame to about 4 inches by 6 inches as it ran the film stock through the viewer at the proper projection speed -- was not invented until much later. In 1915, editors had to hold the footage up to the light to see each frame and/or use a magnifying glass; but they could not also run the film at speed at the same time. Hence, many of the subtlest nuances that cross the hero's face could not be clearly seen and judged in editing: _Regeneration's_ editor often cuts away before the movement has settled, or cuts into a close or medium shot of the hero after the nuance has already begun.
Watching the film on a large screen today, one is aware how powerful present-day editing technics are at capturing all such movements in the hands of a skilled editor. In _Regeneration_ there is a distinct feeling of rough editing at the moments we leave or cut to the hero at the "wrong" instant. By the way, the original title was NOT _The Regeneration_, but _Regeneration_ alone. From which we can surmise that Walsh was looking to create a work with universal meaning.
