67d072b0c4bb Portrait of an unknown young woman Rogier van der Weyden 1435 1440 c. C The Trustees of the British Museum copy.

Meredith Hale:

As Horbatsch notes in the catalogue, only a small fraction of 15th-century drawings, the earliest works in the show, survive and all extant examples were made as functional objects in the studio. Drawings were valuable workshop material, handed down from master to disciple. The sole surviving drawing by van der Weyden’s own hand, a silverpoint portrait of a young woman (c.1440), is thought to be a free copy after a lost portrait by Jan van Eyck, and it reveals not only van der Weyden’s practice of copying works by his most famous predecessor but also his subtle use of line and keen observation of texture and facial expression.