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| Pl. LXV. | Two preparatory studies for the Sforza monument; from the Royal Library, Windsor Castle: No. 1 drawn with the pen, No. 2 drawn with the silverpoint on bluish tinted paper. |
The Sforza monument refers to the massive, unrealized bronze equestrian statue of Francesco Sforza, the Duke of Milan, which Leonardo worked on for many years.
XXI.
Pages 381—417
Drafts of letters and reports referring to Armenia (1336, 1337). — Notes about adventures abroad (1338, 1339). — Drafts of letters to Lodovico il Moro The Duke of Milan and Leonardo’s patron. (1340—1345). — Draft of a letter to a Commission at Piacenza (1346 to 1347). — Letter to Cardinal Ippolito d’Este (1348). — Draft of a letter to the French Governor of Milan (1349). — Drafts of letters to the Superintendent of canals and to Melzi Francesco Melzi, Leonardo’s pupil and heir. (1350). — Drafts of letters to Giuliano de’ Medici (1351, 1352). — Draft of a letter written at Rome (1353). — An imaginative letter (1354). — Miscellaneous drafts of letters and personal records (1355 to 1368). — Notes bearing dates (1369—1378).
XXII.
Pages 419—472
Memoranda before the year 1500 (1379—1413). — Memoranda after the year 1500 (1414—1434). — Memoranda of unknown dates (1435—1457). — Notes on pupils and artisans (1458—1468). — Quotations and notes on books and authors (1469—1508). — Inventories and Accounts (1509—1545). — Notes in unknown handwriting among the Manuscripts (1546—1565). — Leonardo’s will (1566).
Pages 473—478
Pages 479—499
History of the Manuscripts. Bibliography...