9 ms notes and letters written by Lt Col Charles Cooper-King (1843-1898), Lecturer in Geology and Fellow of the Geological Society, from his home in Camberley, June 1888 - September 1892, to Professor Spenser Wilkinson, discussing their friendship, studies, his work on examinations, ideas on mobilisation for volunteers, and invitation to join the United Service Magazine; together with a printed copy of correspondence managed by the United Service Magazine between FM Lord Roberts and Col Maurice, on the subject of the defence of India.