Giorgio Vasari, Lives of the Most Excellent Painters… (1850)
“ And the man who should have laboured with all his powers to secure the fame and increase the glory of Piero, from whom he had acquired all that he knew. Fra Luca del Borgo namely,—he, on the contrary, envious and malignant, did his utmost to annihilate the name of Piero, his instructor, and sought to arrogate to himself that honour which was due to his teacher alone, publishing, under his own name, all the laborious works of that good old man, who, in addition to the acquirements named above, was highly distinguished in painting also. ”
