Autograph Letter Signed, to Lady Parker, offering his congratulations on the forthcoming marriage of her second daughter to Archibald Smith, “a very good fellow.” 2 pp. 7 x 4½ inches, fine. Flamsteed House, Greenwich, 7 February 1853. Sir George Biddell Airy (1801-92, Astronomer Royal from 1836). Archibald Smith (1813-1872), Glasgow mathematician, author of A Graphic Method of Correcting the Deviations of a Ship’s Compass (1855) and related works.