The U. S. Declaration of Intention and Petition for Naturalization of Eert Ubbe Iwerks, father of Ubbe Eert "Ub" Iwerks. Ub Iwerks worked closely with Walt Disney during the beginning of their careers in animation in Kansas City. The petition for naturalization contains a record of Ub's birth date and place. Although Eert arrived in the United States from Germany in 1869, he did not file for naturalization until shortly after World War I.
Staged shot with a fake camera on the roof of the Laugh-O-Gram building. Walt Disney holding a gun over Carman Maxwell; Ub Iwerks is "directing"; Adolph Kloepper behind the camera; Rudolf Ising standing in the background.