Workshop of Francesco di Giorgio Martini
Design for Handle-Propelled Paddle Wheel Boat, and a Hinged Boat in Four Sections. Verso: Designs for War Machines, Pontoon and other Bridges
Pen and brown ink, over several lines in red chalk, on paper; horizontal line incised with stylus between two designs; pricked with compass; verso: pen and brown ink; three horizontal lines incised with stylus.
9 1/2 x 8 1/4 inches (241 x 207 mm)
Inscribed at lower left, in black chalk, "2(?)38"; faintly, at lower right, in black chalk, "Leonardo?".
Dr. Ludwig Pollak (Lugt S. 788b); J. Weitzner, New York; from whom purchased in 1963 by János Scholz, New York (no mark; see Lugt S. 2933b).