- Ask Maestro Antonio how mortars are positioned on bastions by day or night
- [Ask about] the measurement of the sun promised me by Maestro Giovanni Francese
- [Discover] the measurement of Corte Vecchio (the courtyard in the duke’s palace).
- Draw Milan
- Get the Brera Friar (at the Benedictine Monastery to Milan) to show you De Ponderibus (a medieval text on mechanics)