Material concerning work on the geodetic surveys and longitudes in Britain, Europe and India. The papers include two maps of triangulations in Ireland (one on a smaller scale); a plan of principal triangles in Britain; a map of triangulations in Germany; a sketch of triangulations at Royston, Bedfordshire; calculations to find the latitude and longitude of Ben Lomond; triangulations in Scotland and on the Shetland Isles; disturbances of gravity of Shanklin Down, Isle of Wright, with a list of stars observed; work relating to the Indian survey, including a memorial to G. Everest; and geodetic log tables. There is also correspondence with F. Baily, T.W. Colby, F. Beaufort, W. Yolland, J.G.S. Lefevre, G. Clerk, F.G.W. Struve, J. South, H.C. Schumacher, T. Spring-Rice, J. Borrow, G. Everest and the Earl of Ripon.