A typewritten catalogue, with some manuscript insertions, by Francis Green, St Davids of deeds and documents, sixteenth to nineteenth century, in the possession of J. H. Davies [i.e. the Cwrtmawr collection of deeds now in the National Library of Wales and described in detail in a typewritten catalogue (1956)] relating to the families of 'Saunders of Pendine, Vaughan of Jordanston, Warren of Trewern, Allen of Cresselly, Philipps of Trellewellin (Manerawen), Price of Pendine, Williams of Dolgwm, Lewis of Llanveyney (Llangurig), Nelthorpe of Carmarthen, Shorter of London, Owen of Orielton, Lloyd of Peterwell, Powell of Mydrim, Wilkin of Lanrian, Higgon of Spittle, Williams of Pencarreg, Stedman of Strata Florida, Lewis of Llysnewydd and Herbert of Llanvihangel y Croythin', and of deeds and documents, sixteenth to seventeenth century, from the same collection relating to properties in Cardiganshire.

Personal papers of Sir John Williams comprising notes, essays, lectures and transcripts by him, [19th century]-[early 20th century]; certificates and testimonials, 1858-1915; cards and letters from the children of King George V and invitation cards to royal functions, 1889-1916; documents relating to his various honours, 1894-1911; photograph and stamp albums, 1849-[early 20th century]; other photographs, [1840s]-1905; press cuttings, [c. 1870]-1926; letters collected by Sir John, 1633-1912; letters to him, 1879-1922, the correspondents including members of the Royal Family; deeds and other documents relating to properties in Llangadog, to Plas Llanstephan and to Harley Street, London, 1790-1918; bibliographical material, [19th century]-[20th century]; medical notebooks and other papers, 1855-1900; diaries of Sir John and Lady Williams, 1872-1925; estate and financial records, 1890-[1926]; papers relating to public affairs, 1870-1911; miscellaneous items collected by Sir John, 1795-[c. 1919]; personal possessions, including University and commemorative medals, insignia, medical equipment, and ceremonial trumpets, 1861-1913; and deeds collected by Sir John Williams, 1546-1869, comprising deeds of the Vaughan family of Llanelli, Carmarthenshire, the Penry family of Swansea, Glamorgan, and the Dalton family of Pembrey, Carmarthenshire, 1545-1677, relating to properties in Llangennech and Pembrey, Carmarthenshire; deeds of John Jones, Ystrad, Carmarthenshire, relating to Llansadwrn, Carmarthenshire, 1632-1793, and the borough of Carmarthen, 1611-1869; Wynn of Gwydir deeds, 1352-1797, relating mostly to Caernarfonshire, Merionethshire and Denbighshire; miscellaneous Welsh deeds, relating mainly to properties in Carmarthenshire and Cardiganshire, 1451-[c. 1840]; and miscellaneous deeds relating to England (mainly Cornwall and Staffordshire), Ireland, and Scotland, 1586-1896.

Documents collected by Col. Sir John Conway Lloyd, including over a thousand deeds, 1323-1870, relating to properties in the counties of Brecon, Glamorgan, Hereford, Monmouth, Radnor, Cardigan, Carmarthen, Gloucester, and London; together with various documents, including letters and papers relating to the Lloyd family and other estates. In addition, the archive consists of deeds and documents, 1588-1864, mainly of industrial interest accumulated by John Lloyd (1833-1915), pertaining to the New Weare ironworks, Goodrich, Hereford; the Hirwaun ironworks; the Beaufort Iron Company, the Clydach ironworks; the Dowlais Iron Company; and the Bute Works. A substantial group of Dinas Estate records has been transferred to the Maybery Collection.