Papers regarding the trial of telescopes, binoculars, mirrors, gun directors, etc., for the Royal Navy:

Letter from the Admiralty, 1885, asking that the Astronomer Royal draw up a specification for telescopes for automatic sights of turret guns, so that the purchase may be put out to competitive tender.

Form for the forwarding of a pattern of a gun director (pattern 306, registration no. 27) from Portsmouth, 1885.

Blank form for use in tendering estimates for the manufacture of telescopes, 1884.

Letter from the Astronomer Royal to the Director of Navy Contracts on the subject of the specifications for the telescopes to be purchased for gun directors, 1885.

Correspondence on the design, specification and trial of telescopes for gun directors for the Navy, 1885-1888. The correspondents are R.D. Awdry, A.S. Commin, J. Collett, T. Cooke and Sons, T. Dallmeyer, Captain A.J. Fisher, Sir H. Grubb, W. Halewhite, A. Hilger, Messrs Ross and Co., W.E. Smith, the Director of Navy Contracts, H.H. Turner and W.J. Wickison

Correspondence on the trial of binoculars for the Navy, and correspondence with the Admiralty, 1886-1887. The correspondents are G. Christwick, J. Collett, W. Halewhite, Captain I. Long, the Director of Navy Contracts, Messrs Troughton and Simms, and J. Wheeler.

Correspondence on the trial of mirrors for electric search lights for the Navy, and general correspondence with the Admiralty and others, 1885-1887. The correspondents are J. Collett, Sir H. Grubb, W. Halewhite, Captain I. Long, E. MacGregor, H.L. Maule, Captain Markham and H.H. Turner.