Four volumes of transcripts by J. H. Davies, E. A. Lewis, T. Vaughan Roberts, and T. Hamer Jones and typescript copies, with editorial emendations and additions, of the letters of the family of Morris of Llanfihangel Tre'r Beirdd, Anglesey ('Morrisiaid Môn'), which were published in J. H. Davies (ed.): The Letters of Lewis, Richard William, and John Morris, of Anglesey ... Vols. I-II (Aberystwyth, 1907-09). The collection contains some portions of letters (generally in the form of tabulated accounts) and other items omitted from the printed edition (e.g. an inventory of the estate of Lewis Morris, 1765; an 'Index of British Shells and Fossils ...'; a fragment of a dictionary of personal and place names; etc.).