“Like most artist-craftsmen of his era, he did not sign his work. Although he copiously documented trivial items in his notebooks, including the amount he spent on food and on Salai’s clothes, he did not record what he was painting, what he had completed, and where his works went. For some paintings we have detailed contracts and disputes to inform us; for others we have to rely on a snippet from the sometimes reliable Vasari or other early chroniclers. Isaacson, Walter. Leonardo da Vinci (p. 325). Simon & Schuster. Kindle Edition. Isaacson, Walter. Leonardo da Vinci (p. 325). Simon & Schuster. Kindle Edition. ”
