Astronomy.- Airy (Sir George Biddell, astronomer, 1801-92) 10 Autograph Letters, 1 TLs & 2 Autograph Postcards signed to a variety of people including Wentworth Dilke, Sir Benjamin Brodie, William Dobie and others, together 17pp. & 2 sides,, 8vo et infra, Royal Observatory, Greenwich, 21st June 1851 - 23rd February 1880, relating to various professional and private matters, including lectures, answering biographical questions, sending a signature of Sir John Herschel and on the constellation Aquila, "I am obliged by your letter... relating to the distant companion of Aquilae. Perhaps you and Mr. Webb will make a short communication on it to the R. Astronomical Society. The circumstance that Aquilae is a standard star at the R. Observatory is in itself rather adverse to the discovery of any small companion to it; because, though often observed, it is always observed in an illuminated field", folds, several removed from album ff. (13 pieces).