Go and Get It (partially found silent horror film; 1920)
Go And Get It is a 1920 American silent adventure/horror/comedy film directed by Marshall Neilan and Henry Symonds.
The plot was about a newspaper owner, Helen Allen (Agnes Ayres) partenering with reporter Kirk Connelly (Pat O'Malley) as she suspects her publisher of being corrupt and plotting with a rival. Meanwhile, violent murders are happening, perpetrated by an ape-man, a gorilla who's had the brain of a brutal criminal transplanted in it by a mad scientist.
By its release, the film got many positive reviews, with special mentions to the gorilla character, portrayed by former boxer Bull Montana (who would portray another ape-man in 1925's The Lost World).
It is unknown if copies of the film survive, and only a few promotion posters are available to see, with some production photographs.
The movie was remade in 1941 as The Monster and The Girl.
References
http://www.hollywoodgorillamen.com/2010/02/originally-posted-02-25-2007-in-my.html Blog about movie gorillas.
http://www.hollywoodgorillamen.com/search/label/Go%20and%20Get%20It%20%281920%29
http://www.hollywoodgorillamen.com/search/label/Bull%20Montana
http://pastebin.com/Bz8hRxZW Proof of lost status
http://www.silentera.com/PSFL/data/G/GoAndGetIt1920.html Page on Silent Era website; status is "unknown".