© National Portrait Gallery, London
William Withering with 'Dr Withering analysing the Queen's Bath at the request of the Court of Portugal'
by William Ridley, published by Robert John Thornton, after Carl Fredrik von Breda
stipple engraving and etching, published 15 November 1801
18 3/8 in. x 12 7/8 in. (468 mm x 327 mm) paper size