It turns out Photoshop was a thing even in the 19th century

Instead of a computer, they used glue, paint and scissors but the final idea is still the same as today,  create a new image full off imagination.

http://www.dazeddigital.com/photography/article/20483/1/it-turns-out-photoshop-was-a-thing-even-in-the-19th-century