The Print Collector (page 127)

Study of a rocky cavern with ducks Leonardo Da Vinci

Study of a Monk Raphael

Study of a male head Esaias van de Velde

Study of a lemon tree Anonymous

Study of a Lady Constantin Guys

Study of a Knight Leonardo Da Vinci

Study of a Knight Leonardo Da Vinci

Study of a Jew Adolph Menzel

Study of a human skull Leonardo Da Vinci

Study of a Head Anonymous

Study of a Head Charles Padday

Study of a head Jean-Antoine Watteau

Study of a head Anonymous

Study of a girl's head Gaetano Gandolfi

Study of a garment for St Anne Leonardo Da Vinci

Study of a Dutch boatman Nico Jungmann

Study for the St Bernardino in the Votive picture of Doge Gritti Titian

Study for the sleeve of the right arm of St Peter Leonardo Da Vinci

Study for the painting of the engraver, Peter De Jode the Younger Anthony van Dyck

Study for the Martyrdom of St Lawrence in Venice Titian

Study for the head of St James and an architectural drawing Leonardo Da Vinci

Study for the Head of an Old Man Peter Paul Rubens

Study for the greyhound in the portrait of the Duke of Richmond Anonymous

Study for The Gates of Dawn Anonymous

Study for the figure of an apostle Correggio

Study for the figure of an apostle Fra Bartolomeo

Study for the enamel portrait of Emperor Wilhelm II of Germany Anonymous

Study for the child in the 'Dance of Death' Hans Holbein The Younger

Study for the 'Trivulzio Monument' Leonardo Da Vinci

Study for the 'St Sebastian' Anthony van Dyck

Study for the 'Martydom of St Stephen', by Tintoretto Jacopo Tintoretto

Study for the 'Adoration of the Magi' Leonardo Da Vinci

Study for Gown, Court of Henry VIII Anonymous

Study for Baron Aloisi, Italian statesman Edmond Xavier Kapp

Study for an Entombment, attributed to Raphael Raphael

Study for a figure of Christ Anonymous