La perspectiue : auec la raison des ombres et miroirs
Salomon de Caus's treatise on perspective, shadows and mirrors, printed in London by Ian Norton in 1612 and written in French for artists, architects and students of optics. Its pictures are ruled geometric diagrams of receding planes, orthogonals and cast-shadow lines, which a designer could borrow as construction grids for depth and light.
