The fine modelling in the face is evident in normal light and in the x-ray in the centre, as is the crack down the centre of the panel, where there are some paint losses. Considerable underdrawing can be seen in the face in the infrared reflectogram on the right. The lines are not continuous, which suggests that they were probably made with a wet drawing medium over marks transferred from a preliminary drawing or pattern. In some areas the underdrawing can be seen through the paint surface; for example, in the sitter's right eye.
© National Portrait Gallery, London