Brute Force
Plot: A thin gent in formal wear, amid a club or party, reads a book about primitive man after he's ignored by a pretty lady. We see the book enacted: Weakhands loses his girlfriend to Bruteforce, but chances upon a design for a weapon to vanquish his rival and win her back

Robert Harron
Mae Marsh
William J. Butler
Wilfred Lucas
Alfred Paget
Jennie Lee
Harry Carey
D.W. Griffith
Frank E. Woods
Billy Bitzer