Letters and postcards addressed to Thomas Edwards. The correspondents include Sir John Herbert Lewis, Caerwys, 1912; Sir John Edward Lloyd, Bangor, 1911; Charles S. Mainwaring, Galltfaenan, Trefnant, 1904-14 and undated; Llewelyn Nevill Vaughan Lloyd-Mostyn, 3rd baron Mosyn, 1912; Alfed Neobard Palmer, Wrexham, 1911; D. Rhys Phillips, Swansea, 1906; Sir John Rhys, Oxford, 1911; Ethel Stokes, Chancery Lane, London, 1915; and John Thomas ('Eifionydd'), 1905-?6.
Among the subjects discussed in NLW MSS 9002E, 9003-9004C are ancient monuments in Flintshire; the history of Prestatyn Castle; the activities of Dyserth Field Club and 'Cymdeithas Cymry Caer'; measures of the Gop, Newmarket; the friar preachers of Rhuddlan; the pedigrees of Ellis Gruffydd, 'a soldier of Calais', of Hughes of Kinmel, and of Wynne of Copa'rlenni, and of the recipient; the works of 'Talhaiarn'; and the biography of Hugh Jones ('Erfyl').

Material relating to the history of the parish of Newmarket, including extracts from public records ('Welsh Records', Recognizance Rolls, Chamberlains' Accounts, 'Taxatio' of Pope Nicholas) and from Bodrhyddan estate muniments; a transcript of the boundaries of the parish made by John Calveley of Stapleford, 1813; transcripts of tombstone inscriptions; extracts from, and notes on, the parish registers; and notes and pedigrees from printed sources.