Page 62

The page contains two distinct clusters of tally marks. Each cluster is followed by a vertical divider and a total written in Leonardo's characteristic mirror script numerals. These likely represent counts of observations or specific items recorded during his work.

| 23

The top group consists of approximately 23 tally marks.

| 27

The bottom group consists of approximately 27 tally marks.

A manuscript page features two groups of ink tally marks used by Leonardo da Vinci to record counts. Each set of marks ends with a vertical bar and a total recorded in mirror script. The upper set equals 23 and the lower set equals 27. Faint red chalk smudges appear on the paper, which is common in Leonardo's notebooks. This page demonstrates his practical use of tallies for recording data or observations.