This collection consists of material relating to Hugh Price, John Price (1754-1804), his son, also John Price (1780-1855), John Bulkeley Price and the Hughes family of Llanddaniel, Llangaffo and Ty'n y Caeau. It contains a variety of material including legal and administrative documents including letters, wills and codicils. Also contains pedigrees, genealogical notes, plans and maps.
An interesting feature of the collection are the commonplace books which have entries in four different hands: John Price the elder, John Price the younger and two formal copperplate hands, one of which may be that of the Reverend Evan Lloyd, Rector of Aberffraw. These contain a variety of information relating to north Wales and Anglesey in particular as well as Ireland and Scotland, such as pedigrees, statistics relating to holders of the various offices, population and voters. Also contains information on administrative procedure such as the rules to be observed by the court of the Great Sessions and the duty of High Sheriff etc. There are also militia orderly books and enclosures compiled by the younger John Price with rules and guidance for officers, names of officers and letters.