Correspondence with the Nautical Almanac Office, primarily with W.S. Stratford over the 'Nautical Almanac', and including topics such as the minor planets, Jupiter's satellites, Halley's and Encke's Comets, and errors in the 'Nautical Almanac' and Greenwich observations. There is further correspondence with the British Association for the Advancement of Science on the subject of producing a comprehensive star catalogue and reductions. The correspondents include Sir J. Barrow, Sir J. South, E. Sabine, K.L.C. Rümker, F. Baily, J.F.W. Herschel, G. Peacock, J. Challis, R. Sheepshanks, F.V. Mauvais, W.H.F. Talbot, Sir F. Beaufort, Sir G. Everest and J.R. Hind. There is also a paper by J.F.W. Herschel, read to the Board of Longitude, 1827.