Correspondence with Major Butler V.C., 1891, concerning the annular eclipse of 18 September 1857.
Correspondence with C.R. Simpson concerning the solar eclipse, 1893, with a sketch of a solar eclipse sent by S. Vincey.
Correspondence on eclipses in 1896: W. Norton on the date of the next eclipse and S.E. Grant on eclipses of 1831.
Correspondence concerning eclipses in 1897: J.E. Hurt on the locality of eclipses, 1 February 1897; E.C.P. Barber on photographs of an eclipse seen in Chile; and J. Coldwell on the eclipse of 29 July 1897.
Correspondence on eclipses in 1898, including requests for photographs and explanations of spectroscopic bands.
Correspondence on eclipses in 1899, including requests for photographs and observations made and H.P. Maiden on unrealistic theory, occultations and chronometers for eclipse use.
Correspondence on eclipses in 1900-1902.
Written list of photographs received from the Lick Observatory, 1903, mostly taken by the Crocker Expedition in Sumatra.
General correspondence with individuals concerning eclipses, 1906.
General correspondence on eclipses, including correspondence between P.H. Cowell and E.H. Parker, Liverpool, concerning ancient Chinese eclipses.
Letter from R. Wilkinson, 1908, requesting details of eclipses over the Pacific Ocean in 1909.
Reply to B.B. Dobbs of Alaska, 1909, acknowledging a photograph of the eclipse of 17 June 1909.
Reply to G.R. Smith, Tasmania, concerning eclipses and his photograph, 1910.
Letter from A.W. Claydon of Exeter regarding the eclipse of 17 April 1912, with photographs and thermograph and actinograph traces.
Correspondence with individuals concerning eclipses, 1913-1916.
Correspondence with the Canadian Pacific Railway concerning the arrangements and fare for the Japan Eclipse Expedition, 1895-1896.
Correspondence with the Allan Line, the London and North Western Railway, and Pickfords concerning the transportation of baggage for the eclipse expedition, 1896.
Correspondence with American astronomers regarding invitations to Christie to make visits during the trip to Japan, 1895-1896.
Series of newspaper cuttings of eclipse notes, 1896.