The  Alfred Hitchcock " Miniatures and matte painting"

 Blackmail (1929)
 

Cinematography by Jack E. Cox

"we used the Shüfftan process because there wasn't enough light in the museum to shoot there. You set a mirror at an angle of 45 degrees and you reflect a full picture of the British Museum in it." Hitchcock had nine of the pictures made, showing various rooms. But the producers knew nothing of the Shüfftan process, and since they might have objected, Hitchcock performed his magic without their knowledge."
From Francois Truffaut book on Hitchcock.
 

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