Papers concerning instruments not held by the Royal Observatory:

Extract from 'Engineering', 19 December 1890, concerning the new telescope for Melbourne Observatory.

Letter from Bishan-Lal-B-A Sripershad of India regarding the whereabouts of a telescope owned by his father, 1892.

Letter from the 'Yorkshire Post' regarding the largest telescope in the world, 1894.

Correspondence with Dr Rambaut regarding the new mounting for the 15-inch at the Dunsink Observatory, 1894.

Letter from H.P. Casson regarding the driving of observatory domes, 1894.

Letter from Whittingham and Co. offering a Monkhoverns Solar Camera for sale to the Royal Observatory, 1894.

Enquiry from J. Gallatly, London, regarding second-hand telescopes, 1894.

Letter from G.W. Pillar, Canada, who wants to buy a telescope, 1894.

Letter from A.H. Swinton, Zurich, regarding a new type of telescope, 1894.

Extract from 'Engineering' regarding the 12½-inch telescope for Rio de Janeiro, 1894.

Correspondence with Troughton and Simms regarding Turner's 'Star Correction Machine', 1894.

Correspondence with various individuals regarding telescopes and the use of balloons for astronomical purposes, 1895-1897, with correspondence on the testing of instruments.

Correspondence regarding the wireless time signals at the Leigh Technical School, Bolton, 1899.

Correspondence with various individuals, 1899-1901, regarding clocks and chronometers in their possession, differences between refracting and reflecting telescopes, sources of the supply of telescopes, sources of the supply of other instruments, requests for private instruments to be tested, and enquiries regarding the supply of magnetic instruments for private use.

Correspondence with J. Franklin Adams regarding a reseau sent by him for checking, 1900.

Correspondence with W.D. Hozhold, Argentina, regarding the inventor of the theodolite, 1901.