of note is that Sarrat on is reporting page 359 of the work of 1813 on several games from a treatises published 1769, all with "5. K to Rook's square". These games compare very well with those reported on p. 217 ff. of the work of the Opera d'Autore Modenese in 1769.
Salvio/Walker: "After prolonging his visit yet a few days, the Puttino then sailed for Spain, with Giulio Cesare da Lanciano, but passing Naples by the way, halted for a short space of time at Genoa. ... So Leonardo departed for Marseilles, leaving his friend and follower, Giulio Cesare, at Genoa, as a medium of correspondence with his secretly betrothed bride." http://mark_weeks.tripod.com/chw04c15/chw04c15.htm