 He went on to construct Empress movie theaters in Anchorage (1916) and Fairbanks (1927), as well as the Lacey Street Theater (Fairbanks, 1936–1940) and the Fourth Avenue Theatre (Anchorage, 1941–1947; construction was interrupted by World War II).From 1920 to 1922, Lathrop served in the Alaska Territorial House of Representatives.In 1924, he produced "The Chechahcos", the first feature-length film shot entirely in Alaska.