As the inscription implies, the small sketch is related to the painting of Henri IV receiving the Spanish Ambassador of 1817 in the Louvre, G. Wildenstein, The Paintings of J.A.D. Ingres, London, 1956, no. 113, fig. 113 . In the picture the King giving his son a piggyback ride is in reverse to that of the present drawing. The other studies may conceivably be connected with Ingres' Entry of the Dauphin, later Charles V in Paris of 1821 in the Wadsworth Atheneum, in which there is a soldier in a similar pose, again in reverse, Wildenstein, op. cit., no. 146, fig. 87