Autograph Letter Signed, to Lord Avebury, accepting his invitation. 1 page 7 x 4 inches, in good condition. 10 Chester Terrace, 6 October 1904. The uncommon autograph of Sir Archibald Geikie (1835-1924), Scottish geologist who became head of the Geological Survey of Great Britain in 1881. He became President of the Geological Society in 1890 and a knighthood followed in the same year. Throughout his career his private life was spent also on fieldwork and in research. He published many books, most notably ‘Scenery of Scotland’ in 1865, ‘Textbook of Geology’ in 1882 and ‘Ancient Volcanoes of Great Britain’ in 1897.