[1867 – 1917] German art critic and author

Since the introduction of the gum print their results have no longer anything in common with what used to be known as photography. For that reason one can proudly say that these photographers have broken the tradition of the artificial reproduction of nature. They have freed themselves from photography. - Karl Voll , A Concise History of Photography by Helmut Gernsheim , ISBN: 0486251284 , Page: 178