Photo 2 on this page is the poster from "A Little Brother of the Rich (1919)" and it shows Kathryn Adams, Frank Mayo, J. Barney Sherry and Lila Leslie, none of whom are in the 1915 film, but can't be added since the page is locked in on the 1915 film.
This film is listed in the American Silent Feature Film Survival Database as; No holdings located in archives.