Correspondence with tradesmen, initials N-W, including letters from booksellers; clock repairers; horologists; draughtsmen; instrument makers; opticians; parcel carriers; engineers; chemists; the Phoenix Gas Company; the Gutta Percha Company; customs; journeymen; ironmongers; a scrap-metal dealer; the Post Office; a stove maker; and an auditor. The letters cover various instructions; requests; accounts; bills; receipts; circulars; tenders; invoices; routine repairs; and adjustments and improvements to instruments. There are letters from J. Glaisher, C.A.F. Peters, W. De La Rue, C.V. Walker and W. Simms. There are also proposals for an equatorial telescope and mountings by Ransome and Simms, including plans for a proposed equatorial clock and its position; the clock-bracket; the framework for the polar axis; a dome for the telescope; pier plates and supports; and apparatus for a moving wall and roof shuttles, and for turning the dome.