Châteaux drawings.
Fifty Years of Work:
| Hours of work | |
| 12,000 Sketches | 20,000 |
| 400 Major Drawings | 10,000 |
| 20 Easel Paintings | 20,000 |
| 125 Treatises (still incomplete) | 16,000 |
| Murals (and their cartoons) | 15,000 |
| Bronzes | 15,000 |
| Dissections and Anatomy Studies | 10,000 |
| Engineering Projects (canals, locks, swamps) | 20,000 |
| Architecture, Music, Horology | 10,000 |
| Maps, Geometry | 5,000 |
| Geometry, Hydraulics | 5,000 |
| 146,000 |
N.B. I have destroyed 188 drawings. I have retained several maps, and I may retain several drawings of people here at Amboise. Francesco is to destroy most of the military sketches and drawings because many are lifted from old books and manuscripts. It was my intention to compile an encyclopedia of machines of all kinds.
1519
Cloux
January 3, 1519
| I |