(1) General correspondence, 1891-1905

1891: E.P. Sealey's request for a transit of Venus negative.

1892: Lane and Oscar's request to be allowed to buy photographs; W. Brookes on matter required for a photographic talk; E.P. Ridley on apparatus for a spectrum experiments; and A. Berry and J.R. Clapham's request for solar positions.

1893: Correspondence with A.A. Common and the Royal Astronomical Society regarding photographs for the World Fair in Chicago; D. Riordan's request for Greenwich photographs; D. King's request for sunspot photographs; Cassell and Co. on a photograph of the great sunspot of February 1892 for a book on the Sun; and J. Otherand on the loan of a lantern slide.

1894: Dallmeyer Ltd's request for a negative of a sunspot, and H.H. Turner on the loan of photographs and magnetic registers.

1895: M. Puiseau on the presentation of photographs to the Royal Observatory and the Royal Astronomical Society.

1898: General Gore on the density of Indian solar photographs, with a memorandum by E.W. Maunder.

1899: Request by Professor Young of Princeton, New Jersey, for sunspot photographs; Sir Howard Grubb's request for a specimen of a photograph from the 26-inch telescope; G.E. Lumsden's request for sunspot photographs; J. Thornton on the loan of lunar photographs; and Major Beadon on solar phenomena.

1900: E.E. Barnard on slides wanted for lectures; W.J.S. Lockyer on mean daily sunspot areas; and Sir J.N. Lockyer on estimates of sunspot areas.

1904: A. Schuster's request for heliographic observations for 1901; E. Lebon's request for a summary of photographic work at the Royal Observatory; W.F. Denning's suspicions of a new comet and the lending of a photograph; M.R. Juggerman on a comet photograph taken at the Royal Observatory; H.H. Turner on reproducing Royal Observatory photographs for a book; and C. Jackson's request for Royal Observatory photographs.

1905: Stevens and Brown's request for reproductions of solar photographs; request by 'Parsons Magazine' regarding the reproduction of eclipse photographs; E. Parker's enquiry regarding where to obtain star charts; F.C. Dennett on the print of the largest sunspot; and G.A. Nokes' enquiry if there is a connection between his eyesight and the solar corona.

1908-1908: Correspondence and observations given to various individuals concerning sunspots, sunspot areas and related matters.

(2) Correspondence regarding sunspot observations, 1909

Request from the Solar Physics Observatory for sunspot areas for 1907.

Memorandum by E.W. Maunder regarding the progress of the sunspot measures programme.

Letter to the Solar Physics Observatory stating that the records will be ready for publication in three months.

Correspondence with F.C. Dennett regarding sunspots seen in Ca and H-alpha light on Mount Wilson photographs and requesting Greenwich white light photographs for the same dates.

Further correspondence with F.C. Dennett regarding solar observations and magnetic storms, with references to such events in books by Sir Robert Ball.

(3) Correspondence regarding photographs presented or lent, 1901-1905

Correspondence concerning the loan of photographs for lecture use in 1901.

Correspondence with various individuals concerning the loan of photographs in 1902.

Correspondence concerning the loan of photographs for lecture purposes in 1903-1905.

(4) Correspondence regarding loans and gifts, 1906-1915

Correspondence with individuals, astronomical societies, etc., concerning the loan of photographs and slides in 1906.

Correspondence with individuals and astronomical societies concerning the loan or presentation of photographs and lantern slides in 1907.

Correspondence with individuals and astronomical societies concerning the loan of photographs and lantern slides in 1908.

Correspondence with individuals, publishers and societies concerning the loan of photographs in 1909.

Correspondence with individuals, publishers and societies concerning the loan of photographs and lantern slides in 1910.

Correspondence with individuals, publishers and societies concerning the loan of photographs and lantern slides in 1911-1914.

Correspondence with individuals, publishers and societies in 1915.

Correspondence concerning the loan of photographs and slides in 1916.