A series of act books, being the formal record of the proceedings of the High Court of Delegates, together with files of original acts.
The act books were the formal record of the court's business, covering every stage through which a cause passed, and were copied from entries in the assignation books, which were compiled while the court were sitting.
The act books record not only formal proceedings but also other information affecting the court's work (e.g. appointments of officials). The act books may also include copies of exhibits, usually found in the muniment books, and records of business transacted outside formal sittings.
Act book entries follow a common form, beginning with the names of the parties and their proctors, followed by a summary of the assignation (business to be transacted) and a statement of business actually done.
The act books (pieces 2-21 and 23-24) span the period 1601 to 1695. There are only five gaps in the sequence, the greatest being between 1650 to 1660. It appears that formal act books ceased to be kept from the end of the seventeenth century, their place being taken by the assignation books.
The series also contains files of original acts (pieces 22 and 25-29) spanning the period 1652 to 1758 with many gaps, and file for 1818. The main part of the sequence covers the eighteenth century, after the act books ceased to be kept. The relationship between these papers and the act and assignation books is unclear.