Concise instructions in the art of retouching
A photography manual of 1876 published in London by Marion & Co., written by J. P. Ourdan as a practical guide for photographers learning to retouch negatives. Its plates are numbered anatomical studies of the male head in profile, three-quarter and frontal views, with labelled points and muscle positions drawn in soft pencil and stipple. A designer could take from them the clear use of numbered callout lines, careful tonal shading of skin and bone, and the logic of plate-based instructional layouts.
