Three Leonardo Riddles

In my catalogue of the drawings of Leonardo da Vinci and his school in the Royal Library at Turin, I transcribe the mysterious marginal note on fol. 14 of the Codex on the Flight of Birds as follows: porterassi neve / di state ne lochi / chaldi tolta dallal/te cime de monti / essi lasciera ca/dere nelle feste / delle piaze nel / tenpo della state (Snow in summer shall be gathered on the high mountain peaks and carried to warm places, and there be let to fall down, when festivals are held in the piazzas in the time of summer). While Luigi Firpo in his admirable introduction to the catalogue interprets this note as implying an industrial application of the airplane, I now propose to connect it to the well-known series of so-called profetie. Unfortunately, the catalogue was already printed when the solution of this little mystery came to me.