Robert Herdman RSA RSW (1829-1888) PORTRAIT OF THOMAS CARLYLE(1795-1881), BUST LENGTH Signed with monogram and inscribed 'Chelsea 22 Ap. 1875', pencil, charcoal and red chalks heightened with white on buff paper 33.5 x 23.5cm Provenance: The Roy Davids Collection, Bonhams, 3 October 2005, lot 28 A preparatory drawing for the painting in the Scottish National Portrait Gallery. Thomas Carlyle was a Scottish philosopher, satirical writer, historian, mathematician, and teacher. He was considered one of the most important social commentators of his time.