A miscellaneous gathering of papers, some of which have been endorsed by Bishop Humphreys: (a) papers relating to Denbighshire, including extracts from the Survey of 1334 (ff. 3-7); (b) copies of papers relating to the petition (1619) of Thomas Canon, Surveyor of Crown lands in South Wales, concerning the supplanting of the mountain thieves of Wales, and disposing habitations in convenient places (see Calendar of State Papers. Domestic 1619-1623, p. 55) (ff. 8-9); (c) copy of a list of the inhabitants of Anglesey who were amerced for being in arms and rebellion with Owen Glyndyfrdwy, 1406, with a table of the fines, copies of the jury panels, and a list of outlaws (a portion, the lists for the commote of Llivon from a fragment found among Edward Lhuyd's papers, was published in Archaeologia Cambrensis, 3rd ser., 5 (1859), pp. 177-180; Browne Willis, in A Survey of the Cathedral Church of Bangor... (London, 1721), pp. 84-85, quotes from a copy of this record, which he saw in the collection of the then Dean of Bangor) (ff. 61-90); (d) a seventeenth century Welsh calendar (ff. 10-16); (e) 'Catalogus Alphabeticus s[anc]torum Cambrobritannicae', by Bishop Humphreys (ff. 17-22); (f) copies of papers on British Chronology sent by Robert Vaughan of Hengwrt to Archbishop [James] Us[s]her (c.f. NLW MS 3044B) (ff. 23-51).

A list of the sheriffs of Denbighshire, 1541-1809.

A manuscript containing miscellanea by Richard Llwyd (1752-1835), with a few notes by Angharad Llwyd (1780-1866); Notes on the Registers and Churchwardens' Accounts of St. Michael's, Chester, by J. P. Earwaker, 1890; a letter from W. W. E. Wynne (1801-1880) to Angharad Llwyd; particulars of the sale of the manor of Kinmel, 1784; genealogical tables and papers relating to the family of Jones, Penrallt, Abergele; calendar notes of deeds relating to Denbighshire and Flintshire (many of the original deeds being now in NLW); etc.

A manuscript containing miscellaneous notes, memoranda, transcripts and press cuttings relating mainly to Flintshire and Denbighshire; extracts from Mold churchwardens' account books; numerous letters to H. R. Hughes (1827-1911); transcripts of Civil War and Commonwealth period papers relating to North Wales; a copy of W. D. Pink: Notes on the Middleton Family of Denbighshire ... (Chester, 1891); etc.

Correspondence and genealogical notes and papers relating to the Pierce family of Meiriadog, Denbighshire, later of Cwybyr, Flintshire, 1841-1936; leases and a few other documents, 1596-1764; autograph letters of David Jones, Llangan, 1800, and Rice Owen Jones, Blaenau, 1815; correspondence and financial accounts relating to barques and ships, 1873-1885; and letters, 1934-1936, relating to a stained glass memorial window for Llandrillo Parish Church, Denbighshire.

Papers relating to the administration of the Plas Power estate and household, including some properties belonging to the Chirk estate, some but not all of which became part of the Plas Power estate; also included are some records from other properties in England that were owned by the Myddelton family.

Manuscripts comprising drafts of the hitherto-unpublished portions of Edward Owen's Catalogue of manuscripts relating to Wales in the British Museum, with draft indexes; reports prepared by Edward Owen on Liverpool Town Dues and related papers, 1931; essays written by him for the London Eisteddfod, 1887, and the National Eisteddfod at Caernarfon, 1894; notes, pedigrees, transcripts and letters relating to Welsh history, antiquities, county history, families and individuals such as John Edwards of Chirk, and historical figures including Owain Glyndwr [some items published 1893-1935]; transcripts and extracts relating to the history of Wales taken from public records by Edward Owen, E.A. Lewis and others, including several land surveys, at least one of which was used as evidence before the Royal Commission on Land in Wales, 1895; transcripts of papers by or relating to Alfred Neobard Palmer, Wrexham, 1885-1922; facsimiles and original documents including Privy Purse Accounts of Queen Anne, 1702-1710, and a holograph letter from Queen Anne to Sarah, duchess of Marlborough, 1710; letters mainly addressed to William Edwards of Chirk Hall, 1675-1677; autograph letters, mostly addressed to Edward Owen, 1886-1943; and deeds, 1463-1769, the majority of which relate to the estates of the families of Edwards of Plas Newydd and Puleston of Emrall in cos. Denbigh and Flint.

A manuscript containing eight diaries and account books relating to Flintshire and Denbighshire, including some kept by Thomas Ffoulkes, Mertyn, Holywell, containing entries for various years between 1693 and 1750, and two containing household and farming memoranda and recipes, 1752-1788.