The Burchard Bothers of Germany, had a working Photolithograph technique as early as 1862. Waterhouse visited in 1870 but they did not want to disclose their method, “They said, however, that they worked direct on the stone and did not require a negative or positive transparency; their proofs were exceedingly sharp and good. Their apparatus was very simple; consisting of a large camera resting on a firm stand, at one end of which the planboard was fixed." (The Photographic News, vol. 14 pg. 247)