Aelbert Cuyp (Dutch, Dordrecht 1620–1691 Dordrecht)
Equestrian Portrait of Cornelis (1639–1680) and Michiel Pompe van Meerdervoort (1638–1653) with Their Tutor and Coachman ("Starting for the Hunt"), ca. 1652–53
Oil on canvas; 43 1/4 x 61 1/2in. (109.9 x 156.2cm)
The Metropolitan Museum of Art, New York, The Friedsam Collection, Bequest of Michael Friedsam, 1931 (32.100.20)
http://www.metmuseum.org/Collections/search-the-collections/436063