Portrait of a Man with a Shell, ca. 1625?26, Oil on wood, 9 3/8 x 6 3/4 in. (23. 8 x 17. 1 cm), Paintings, Thomas de Keyser (Dutch, Amsterdam (? ) 1596/97?1667 Amsterdam), The man is a shell collector, in an age when foreign trade opened up a wide world of natural curiosities. His wife holds a balance, symbolizing the virtue of temperance. De Keyser was one of the leading portraitists in Amsterdam during the 1620s and 1630s