Title deeds of houses, burgages and other pieces of land in the town of Harlech and the immediate locality, particularly in Acrey Newydd, Acrey Hen, and Y Gors, many of which were leased or purchased from the borough Corporation, 1327-1649. Detailed boundary clauses in the majority of the deeds provide useful information about the early development and town layout of Harlech.

Administration papers relating to the borough of Harlech, including copies, 1573, of an account of lead at Harlech Castle in 1571; grant of the constableship of Harlech Castle to Sir Henry Lee and Owen Cooke, 1589; a subsequent appointment of a deputy, 1599; a draft petition to the King by the Corporation of Harlech for holding the Great Sessions and Quarter Sessions at Harlech, [c. 1604]-1612; copy of the 1284 charter of Harlech [1604x1612]; regulations for the appointments and duties of burgesses and bailiffs in the town, 1612; and a copy of the results of an official investigation into the Corporation and crown land at Harlech, with the jury 's verdict, 1650.