Giorgio Vasari, Lives of the Most Excellent Painters… (1850)
“ Being received into the school of Raphael, who never refused any request made by a man of good parts, he there laboured in company with many other young men devoted to the study of painting, and who emulously strove to surpass each other, in the hope of obtaining the favour of Raphael, and of securing a name in the world at the same time. Pursuing his studies without remission, Pellegrino became exceedingly skilful in design, evincing great mastery over other departments of his art likewise ”
