DX is an artificial group of miscellaneous donations of manuscripts and archives and it includes a few landed family and estate papers. DX/3 is a copy of the Town's book of Barrow on Humber and DX/4 are papers related to the Hull garrison 1664-1712. There are transcripts of parish registers for Hedon, Holy Trinity Hull, St Mary Lowgate Hull, Sculcoates and some Corporation bench books at DX/5. DX/6 is local history research material comprising a notebook of Driffield place names, the first half of Thomas Widdrington's Analecta Eboracensia of circa 1660 and a file of notes by N J Miller used when compiling Winestead and its lords (1932). DX/7 is a catalogue of the books in the library of A E Trout of South Cave. There are some 1930s diaries of events in Hull at DX/8 and a 1435 letter of attorney of Peter Buckton at DX/19. DX/20 is an 1810 map of Yorkshire by John Cary. The local history research notes of M C F Morris are at DX/21/1-3 and transcripts of records of the Hull Corporation 1293-1886 and accounts of the guild of the Blessed Virgin Mary in Holy Trinity Hull 1463-1536 at DX/28. There is a manuscript of William Gunnell's Sketch of the ancient history of Kingston upon Hull (1873) at DX/32.
There is a collection of estate papers for Cottingham and Market Weighton 1435-1751 at DX/10; a 1770 lease book for Foston, Thixenby and Cowsby at DX/23/2 and small collections of local estate papers including some for Burstwick (DX/12/1) and Somergangs (DX/12/2-3). DX/35 is also a local collection 1544-1835 and includes a quietus, title documents, the wills of Edward Trotter (1708), John Marshall (1773), Richard Marshall (1798), William Whitfield (1799) and a pedigree of the Burton family of Hull Bank. DX/36 is a deposit of similar material 1682-1684. The local history research notebooks of F C Heaven are at DX/37 covering nearly all places names of the East Riding. A miscellaneous bundle of estate papers is at DX/47 including a sale by John Aske of 1593 and the wills of Francis Clarke (1684) and William Wilkinson (1748). There is a photograph of Hornsea Mere with accompanying letter from Marmaduke Strickland-Constable at DX/178.
DX/48 is a bundle of miscellaneous papers including a seventeenth-century plan of Cambridge and papers related to Caerleon. There is a collection of Yorkshire prints at DX/51/3-18.
There is the account book of a Scarborough farmer 1824-30 at DX/13/1 and copies of seventeenth-century reports on agriculture in the East Riding at DX/16. Manuscript summaries of medieval deeds largely relating to the Maxwell Constable family of Everingham are at DX/100.
There is the marriage settlement of Catherine Sone and Charles Allen at DX/34 (1758) and the wills of Elizabeth Allen at DX/23/3 (1838); Anthony Gilby at DX/107/1 (1682); William Gilby at DX/107/2 (1737); Margaret Gilby at DX/107/3 (1790).
There is a lot of material for Beverley including a copy of the account book for the building work at Beverley Parks lodge in 1548 at DX/11; the 1674 Easter Book of parish of St Mary's at DX/14/1 (other material for the parish is at DX/51/19-21 and DX/61); court rolls for the manor of Beverley Water Towns 1649-1764 at DX/50/1-7; and a large deposit of Beverley material on such subjects as mayoral elections, the Mechanics' Institute, pastures and Catholic emancipation at DX/150 (facsimile) as well as a miscellany of material on everything from 1815 rates of carriage into Beverley to almanacs and sale catalogues. There is a copy of an 1811 plan of Beverley at DX/212.
DX/49 comprises notes compiled by John Hamerton to support his claim to the manor of Hunmanby in the sixteenth century with summaries of medieval deeds dating back to pre-1290. DX/129 comprises copies of medieval charters for Holderness There are transcripts of fourteenth-century poll tax returns at DX/177.
Genealogical information can be found for the Aske family at DX/55 (including the will of Christopher Aske 1538), Baines family (DX/196), and Clayton (DX/85), Harrison (DX/196), Hewley (DX/196), Hunstmen (DX/29), Gale (DX/145), Thomason (DX/163/2) and Voase (DX/132) families (some of these have separate Guide entries).
There are subject files of the Georgian Society for East Yorkshire at DX/99 including 1960s files about the Maister house in High Street, Hull.
Household books in DX include Thomas Metcalfe's farming diary and recipe book for 1807 at DX/54 and the herbal of the Reverend William Whytehead, vicar of Atwick, kept between 1757-1817 at DX/68 as well as Sarah Caroline Buthicar's commonplace book/diary 1830-52 at DX/64/2. There is a typescript of the diary of James Dunn 1804-6 at DX/33.