Fig. 5

A Anthony Van Dyck, Portrait of Lord John Stuart and his Brother Lord Bernard Stuart, c. 1638. Oil on canvas, 237.5 × 146.1 cm. National Gallery (London), inv.no. NG6518. The white rectangle indicates the detail area shown in B and C. Permission to use image pending. B Detail of Lord Bernard Stuart. C Matching detail of the infrared photograph showing a dark halo along the head of Lord Bernard Stuart. Images courtesy of the National Gallery London