Autograph Letter Signed, to Mr. Saddler, about strengthening the background of an engraving, suggesting work to be done in advance of Walker’s visit, content with “the foreground you have managed so admirably”. 1½ pages 7 x 4½ inches, in good condition. 64 Margaret Street, Cavendish Square, 6 March 1861. William Walker 1791 –1867), Scottish engraver. He is known for engravings of Sir Henry Raeburn’s portraits of Sir Walter Scott and Raeburn himself, Sir Thomas Lawrence’s portrait of Lord Broughham (commissioned by Walker), and Alexander Nasmyth’s portrait of Robert Burns.