Correspondence regarding admissions to visit the Royal Observatory. The volume is divided broadly into requests by the Admiralty to visit the Royal Observatory, introductions on behalf of visitors, and personal requests to visit the Observatory. The correspondents include H.C.G.G. Lennox, G.H. Richards, F.J.O. Evans, R. Hall, J. Winlock, B.A. Gould, R. Grant, E.J. Stone, A.A. de la Rive, C.T. Bright, J.W. Lubbock, J.C. Adams, E.J. Routh, J. Glaisher, W. De La Rue, W. Farr, the Earl of Rosse, W.G. Clark, F.N.O. Moigno, W. Spottiswoode, T.E.V. Oppolzer, L.A. Quetelet, C.E. Delaunay, J.V. Madler, J. Birmingham, J.W. Draper, L.M. Rutherford, C. Lyell, C.V. Walker, H.C. Rawlinson, G.G. Stokes, F.J. Scudamore, R.J. Hoopell, G.W. Hunt, R.J. Mann, W.H. Flower, T.W. Webb, H. Parkes, F. Guthrie, L.J. Behier, W. Wright, T.A. Hirst and R.J. Mann.