GIA4794248:
Study for a war machine Escorpio by Leonard de Vinci (Leonardo da Vinci) (1452 - 1519). Drawing with pen and ink., Vinci, Leonardo da (1452-1519) / Bridgeman Images
RTR5315955:
Sketch of ornamental motif within oval, c. 1483-1485? (pen and ink on light ochre paper), Vinci, Leonardo da (1452-1519) / Bridgeman Images
RTR5315965:
Studies of the forelimbs of the horse, c. 1490 (metallic tip and whitewash on blue prepared paper), Vinci, Leonardo da (1452-1519) / Bridgeman Images