PérezSánchez, Novedades velazqueñas, pp. 386–390. López-Rey, p. 60. Brown, Velázquez, pintor y cortesano, p. 282. Palomino, p. 233 PérezSánchez, "Novedades
"reflection on reality, representation, and the artistic vision", while AlfonsoE. PérezSánchez says it "has also been seen as a melancholy meditation on the arms