Begun by me, Leonardo da Vinci, on the l2th of July 1505.

[Footnote: Thus he writes on the first page of the MS. The title is
on the foregoing coversheet as follows: _Libro titolato
disstrafformatione coe_ (cioe) _d'un corpo nvn_ (in un) _altro sanza
diminuitione e acresscemento di materia._]