Madonna and Child, Sketches after Leonardo Da Vinci and Fra Bartolomeo of Works in the Uffizi, Florence Daniel Huntington, 1840
Study for standing boy with kid, “Vintage Festival,” Mendelssohn Glee Club, New York, NY Robert Frederick Blum, 1890
Study for "The Triumph of Apollo" for the Ceiling of the Sala delle Muse, Museo Pio-Clementino, Vatican Tommaso Maria Conca, 1770