'The Principles of Geology: Charles Lyell 1797-1875 exhibition 'The Principles of Geology: Charles Lyell 1797-1875' exhibition was a temporary exhibition which ran from Aug-Nov 1975. The exhibition was created as part of the celebrations for the Centenary of Lyell's death. This series contains a file created by the Department of Public Services containing correspondence and papers concerning the development of and preparation for the exhibition 1974-1975