Production advisor Miriam Geiger quickly compiled a handmade film textbook for Welles, a practical reference book of film techniques that he studied carefully. He then taught himself filmmaking by matching its visual vocabulary to "The Cabinet of Dr. Caligari", which he ordered from the Museum of Modern Art, and films by Frank Capra, René Clair, Fritz Lang, King Vidor and Jean Renoir. The one film he genuinely studied was John Ford's "Stagecoach", which he watched 40 times. "As it turned out, the first day I ever walked onto a set was my first day as a director," Welles said. "I'd learned whatever I knew in the projection room—from Ford. After dinner every night for about a month, I'd run "Stagecoach", often with some different technician or department head from the studio, and ask questions. 'How was this done?' 'Why was this done?' It was like going to school."