So you think photomontage was invented in 1916 or 1918 (depending on which of the dada-ists you believe)? These polished examples are from 1893…

1893.JPG

Page one and page two.

And it may well be that they were a high-point, not a beginning…

“In the 1860s and subsequent decades publishers of binocular photographs, such as the London Stereoscope Co. and the American firm Underwood & Underwood, marketed an entire series of ethereal ghosts, angels and fairies for the amusement of the public.” — from: The Perfect Medium, p.52.