Les manuscrits de Léonard de Vinci \
A facsimile edition of Leonardo da Vinci's notebook pages, edited by Charles Ravaisson-Mollien and published in Paris by A. Quantin in 1881 for scholars and collectors of Italian manuscripts. The pictures are pale sepia reproductions of pen sketches with mirror-script notes, showing machines, mechanical parts and flying-machine wings that a designer could use for hand-drawn technical diagram motifs.
