Plas Newydd Papers A collection of 20,871 items divided into nine series consisting in the main of estate and family correspondence, but also including deeds, rentals, accounts and miscellaneous papers relating to Anglesey and Caernarvonshire and ranging in date from 1546 to 1930. Among the subjects covered in varying detail by the correspondence and papers are politics and electioneering in the two counties from 1784 to 1868 (the collection is particularly valuable for the light which it throws on the various Anglesey county elections between 1784 and 1868 and the borough elections, 1832-1868; the Caernarvon county elections of 1784, 1790, 1796 and 1826 and the borough elections from 1784 to 1833); the Anglesey militia and deputy-lieutenancy, 1782-1854; local administration in Anglesey between 1791 and 1854; social and economic conditions in Anglesey and Caernarvonshire (and Caernarfon town in particular), 1789-1856; the Menai Bridge project, 1784-1830; the establishment of schools in Anglesey in the 1840's; and industrial enterprises in which the first Marquess was interested; the Penrhyn Du lead mine (Llanengan, Lleyn), the Penrhyn Mawr colliery (Malltraeth, Anglesey), and the Gallt-y-llan slate quarry (Llanberis). Deeds in the collection refer to land and properties in Aberffraw, Amlwch, Bodlegady, Bodlew, Coedana, Clorach, Dinsylwy Rys, Heneglwys, Hirdre-faig, Holyhead, Llanbadrig, Llanddaniel-fab, Llanddyfnan, Llandrygarn, Llandyfrydog, Llanedwen, Llaneilian, Llanfaelog, Llanfair Mathafarn Eithaf, Llanfair Pwllgwyngyll, Llanffinan, Llanfihangel-yn-Nhywyn, Llanfechell, Llangefni, Llangoed, Llangristiolus, Llanidan, Llansadwrn, Llanrhuddlad, Llysllew, Mathafarn Wion, Penmynydd, Penhwnllys, Porthaethwy, Porthamel, Trefdraeth, Tre-ifan, Tre'r-beirdd, Trewalchmai and Ysgeifiog, co. Anglesey; Aber, Bangor, Caerhun, Caernarfon, Castell, Llanbeblig, Llanbedr, Llanberis and Llanfairfechan, co. Caernarvon; Allington, Bodlith, Chirk, Cristionydd Cynrig, Gwern Halghton, Llansilin and Ruabon, co. Denbigh; Halkin, co. Flint and Penderyn, co. Brecon, 1546-1854. Personalities represented in the deeds include, Sir Henry Bagnall of Newry, Ireland (and Plas Newydd); his sons Arthur Bagnall and Griffith Bagnall; Piers Griffith of Penrhyn, Llandygai; Sir Richard Trefor of Trefalun (his will dated 28 October 1636 is included); Sir Edward Bayly, Sir Nicholas Bayly and the 1st and 2nd Earls of Uxbridge. There is also an extensive series of rentals of the Marquess's estate in Anglesey and Caernarvonshire, 1782-1930, and a few for the Staffordshire, Derbyshire, Dorset, Somerset and Irish properties, 1789-1867. Series VIII consists of establishment papers, which includes household and home farm papers; estate papers of the Llanfair Pwllgwyngyll Agency and the Amlwch Agency, which include papers on Parys Mountain; maps and plans; and general estate papers. Series IX consists of property deeds and documents relating to the parishes of Amlwch, Holyhead, Llandysilio, Llanddaniel Fab, Llanedwen, Llanfihangel Ysgeifiog, Llanfair Pwllgwyngyll, Llanffinan, Llansadwrn, and mixed parishes, co. Anglesey; Dorset, London, Sussex and Ireland; rental and rent receipt books; Inland Revenue papers; insurance papers; estate correspondence; domestic and household establishment papers, personal correspondence and papers; Letters Patents and other documents; papers relating to yachting and shipping; financial papers; maps and plans; and miscellaneous papers, which include papers relating to the Menai Bridge and Anglesey Waterworks, the Chester to Middlewich Canal and papers relating to family history. Mid 14th century-Late 20th century