Giorgio Vasari, Lives of the Most Excellent Painters… (1850)
“ Piero, desiring to do what he could by way of proving his gratitude to Luca Martini, who wrote to him frequently and never ceased to recommend our artist to the good offices of Bandini,—Piero, I say, bethought himself of making a copy in wax from the Moses of Michelagnolo, giving to his work one-third of the size of the original. Now this statue of Buonarroti’s, which makes part of the sepulchral monument of Pope Julius II. in San Pietro-in-Vincula, is a work of so much beauty, that no finer one can be seen, and it was this which II Vinci now made in wax, and sent as a present to Luca Martini. ”
