From Wikipedia

Ella Margaret Gibson (September 14, 1894 – October 21, 1964), was an American stage and silent film actress who had leading roles in Vitagraph westerns, often opposite William Clifford. She also appeared with Charles Ray in The Coward (1915) and later worked in two Westerns with William S. Hart: The Money Corral and Sand!.

In 1999 it was reported that on the afternoon of October 21, 1964 she made a dying confession to the murder of director William Desmond Taylor.

Gibson was sometimes credited or otherwise identified under at least seven other names, such as Patricia Palmer, Margie Gibson, Marguerite Gibson, Ella Margaret Lewis, Ella Margaret Arce or Pat Lewis. She appeared in 147 movies between 1913 and 1929.