Letter from Chs. Lyell
Letter, 1 July 1868
Letter, 1 March 1847
Letter, 10 August 1846
Letter, 10 June 1870
Letter, 11 February
Letter, 11 February
Letter, 11 July 1867
Letter, 11 May 1868
Letter, 12 August 1852
Letter, 12 August 1852
Letter, 12 February 1845