The Keepers of Light William Crawford 1979 Morgan & MorganA History & Working Guide to Early Photographic Processes. The Keepers of Light is a unique and distinctive account of photography dating back to the days of Daguerrotype and the first paper prints. Not just a history but a practical how-to of the alternative processes such as Salted Paper, Ambrotype, Platinum, Palladium, Gum and so on. 318 Pages |