He was famous for many performances. He was well known in this play "Peer Gynt". In fact this playbill was from one of his later performances in October of 1906. he was performing till early 1907.
This biography of Mansfield was done by Paul Wilstach in 1908. It covers much of Mansfield's life. But a little over dramatically though!
These are some press clippings from the time of his death in 1907