[q] The first at the Pitti Palace, the last at the Doria Gallery, and the others at the Louvre.
[r] The full example at the Prado; the Parma full length, in the Frick Coll., N. Y.; and the three-quarter length portrait at the Imperial Gallery, Vienna.
[] In the Doria Gallery, Rome.
[t] See The Breakfast, Hermitage; Christ in the House of Martha, National Gallery, London; and The Drinkers, Prado.
[] Both at the Prado.
[v] Pitti Palace, Florence.
[w] Naples Museum.
[x] National Gallery, London.
[y] The Four Philosophers, or Lipsius and his Disciples, Pitti Palace.
[z] National Gallery, London.