Biography
From Wikipedia
Rosemary Theby (April 8, 1892 – November 10, 1973) was an American film actress. She appeared in some 250 films between 1911 and 1940.
Born Rosemary Theresa Theby in St. Louis, Missouri, Theby studied at Sargent's School in New York. A contemporary newspaper account described her as being of "medium-height, well proportioned, with regular features and dark hair".
Her first film experience came in the Vitagraph production of The Wager. By 1915, she was a star for the Universal film company. During World War I Theby took care of a refugee from Lithuania. After being educated and cared for by Theby, the young woman became her maid during an acute shortage of maids in Hollywood, in 1920.
As Miss Corintee in The Great Love (1918), Theby played the part of a German spy with great skill. The film was written and directed by D.W. Griffith. This was a vamp role which she began to play frequently after depicting characters in slapstick comedies. Theby played a Chinese vampire