Correspondence with tradesmen, initials A-M, including letters from booksellers; instrument makers, including T. Jones; clock repairers; builders; chandlers; the Kent Water Company; merchants; horologists; the income and land tax collector; and stationers. The letters cover requests; accounts; bills; receipts; tenders; invoices; payments of taxes; routine repairs; and improvements, including the erection and specification of a new dome at Greenwich. There are letters by T. Galloway and T. Henderson, and a catalogue of S. Maynard's scientific books.