Pinion [trial proof]
Pinion [trial proof]
Pinion [trial proof]
Pinion [trial proof]
Ruler [working proof]
Ruler [trial proof]
Ruler [trial proof]
Ruler [misc. proof]
Ruler [trial proof]
Ruler [misc. proof]
Ruler [misc. proof]
Passage I [working proof]
Passage I [working proof]
Passage I [working proof]
Passage I [trial proof]
Passage I [misc. proof]
Passage I [misc. proof]
Passage I [misc. proof]
Pinion [verso] [experimental proof]
Ruler [misc. proof]
Passage II [working proof]
Passage II [working proof]
Passage II [trial proof]
Passage II [trial proof]
Watchman [working proof]
Watchman [working proof]
Watchman [working proof]
Watchman [preparatory drawing]
Watchman [trial proof]
Watchman [trial proof]