The Castell Perrott placed uppon the rocke cauled the stacke.

Within black border. Mounted on cloth.
Provenance: From the collection of George Legge, first Baron Dartmouth, 1648-1691 (see Sotheby's sale, March 8-10, 1948). Baron Dartmouth was Master-General of the Ordnance to Charles II and James II. His collection of maps was partly abstracted from Royal map collections, an arrangement described by Pepys in Bodleian Library MS Rawl. A. 171, 17r-20v. See also Skelton and Wallis. The map is numbered "51a" in the Dartmouth collection.
Skelton, R. "The Royal map collections of England." In Imago mundi, vol. 13 (1956), p. 181-183
Wallis, H. "The Royal map collections of England." In Revista da Universidade de Coimbra, vol. XXVIII (1980), p. 466-467
Manuscript plan depicting a triangular fort built around a "stack" (a small offshore island). A dozen cannons are depicted. At each corner of the fort is a flag bearing the Cross of Saint George. The location of the fort is unclear. The castle is probably named after Sir John Perrott (1528-1592), who served as lord deputy of Ireland to Queen Elizabeth. Perrott's son, Sir Thomas Perrott, married Dorothy Devereux, sister of Robert Devereux, who from 1597 to 1601 served as Master-General of the Ordnance to Queen Elizabeth.