Legal papers, 1410-1834, which include writs, bills of complaint, defendants' answers, breviates, court orders, cases with opinions of counsel, affidavits, interrogatories and depositions of witnesses, jury lists, copies and abstracts of deeds, lawyers' accounts, pedigrees to prove title and notes on legal procedure.
A large part of the records comprises disputes over title to land, inheritance or debt in North Wales and Shropshire, which took place in the High Court of Chancery, the Court of the Exchequer, the Court of King 's Bench or the Council in the Marches of Wales, or which were treated as equity cases in the Court of Great Sessions. The most substantial of them concern Sir William Maurice 's quarrels with the Ellis family of Ystumllyn over the title to lands in Gest, [c.1597]-1620; his financial disputes with his step-son, Sir Henry Johnes of Abermarlais, 1611-1620; and Sir Robert Owen 's disputes with Col. William Price of Rhiwlas over the title to lands in Rhedynogfelen and Gest, 1679-1694. A number of the cases provide information about the distribution of both freehold properties and leasehold crown lands in Eifionydd, Caernarfonshire, during the sixteenth and seventeenth centuries. Several other files contain papers relating to the Flintshire estates of the Conway family of Nant, dated from around 1540 to 1633; boundary disputes and trespasses in Merionethshire, 1587-1749; property of the Wynn family of Glyn, 1587-1686; the indebted estate of Sir Robert Owen, 1698-1705; and the illicit activities of William Owen 's agents on the Caernarfonshire and Merionethshire estates, 1733-1754.

Papurau D.G. Lloyd Hughes yn ymwneud â hanes Pwllheli, Llanelli, Pen-bre a Phorth Tywyn, yn cynnwys adysgrifau, torion, erthyglau a chopïau o rannau o'i lyfrau, 1808-[1985]; papurau yn ymwneud â Llanfihangel-ar Arth, New Inn a Gwyddrug, sir Gaerfyrddin, [1985]-2001; erthyglau a gyhoeddwyd ganddo,1968-2001; cofnodion, nodiadau ac erthyglau amrywiol, 1893-2001; gweithredoedd eiddo, 1803-1813; nodiadau achyddol, [20fed ganrif]; catalogau gwerthiant, 1890-1937; mapiau a chynlluniau, 1900-1917; enwau planhigion a blodau, [1950au]; nodiadau, adysgrifau a llungopïau o ddogfennau (13eg i'r 20fed ganrif) yn yr Archifdy Cenedlaethol yn ymwneud â Thir y Goron yng Ngogledd Cymru, yn bennaf yng nghymydau Eifionydd, Afloegion, Cwmwd-y-maen a Dinllaen, sir Gaernarfon, [20fed ganrif]; golygfeydd gwreiddiol o Bwllheli,1780-1982, ac o sir Gaerfyrddin, 1870-1994. = Papers of D. G. Lloyd Hughes relating to the history of Pwllhelli, Llanelli, Pembrey and Burry Port, including newspaper transcripts, cuttings, articles and partial copies of his books, 1808-[1985]; papers relating to Llanfihangel-ar-Arth, New Inn and Gwyddrug, Carmarthenshire, [1985]-2001; published articles by him, 1968-2001; miscellaneous records, notes and articles, 1893-2001; title deeds, 1803-1813; genealogical notes, [20th century]; sale catalogues, 1890-1937; maps and plans, 1900-1917; plant and flower names, [1950s]; notes, transcripts and photocopies of documents (13th to 20th century) in The National Archives relating to Crown Lands in North Wales, mainly the commotes of Eifionydd, Afloegion, Cwmwd-y-maen and Dinllaen, in Caernarfonshire, [20th century]; original views of Pwllheli, 1780-1983, and of Carmarthenshire, 1870-1994.