Unknown artist, Agra, India, Three Large Company School Studies of the Pietra Dura Inlays at the Taj Mahal, c. 1820. Pencil, ink, and watercolor on paper, 35 x 27 5/8 inches (89 x 70 cm); 16 1/4 x 26 inches (41.5 x 66 cm); 40 9/16 x 28 inches (103 x 71 cm). Vertical studies, Private collection, Courtesy of Prahlad Bubbar, London Horizontal study, Courtesy of Prahlad Bubbar, London Todd-White Art Photography, London.