Frithelstock Priory was founded in about 1220 at Frithelstock, Devon, England, by Sir Robert de Beauchamp for Augustinian Canons Regular, as an indulgence to ensure intercessions for the repose of his soul. Walter de Stapledon, Bishop of Exeter, is considered a co-founder, for increasing the priory's endowments. The priory was dissolved in 1536 during the Dissolution of the Monasteries and only ruins remain. History The Domesday Book of 1086 lists Frelelestoch as one of the seventy-nine Devonshire holdings of Robert, Count of Mortain (–1090), the half-brother of William the Conqueror. His tenant was Robert FitzIvo, who appears to have held no other lands in the county. The manor was later held by Sir Roger de Beauchamp who, in about 1220, donated a large part of it to the Augustinian priory dedicated to St Gregory that he had founded within it as a dependency of Hartland Abbey in North Devon. At the Dissolution of the Monasteries, the prior relinquished possession of the priory and its demesne lands on 27 August 1536. Sir Thomas Arundell, the receiver of the Court of Augmentations in the counties of Devon, Cornwall, Dorset and Somerset, farmed the lands out to John Wynslade at an annual rent of £20 2s. On 20 January 1537 the crown leased the lands for 21 years at the same rent to Sir George Carew of Mohuns Ottery. Carew immediately conveyed the lease to Wynslade. Wynslade was not long in possession as on 4 September 1537 the crown made a grant to Arthur Plantagenet, 1st Viscount Lisle (d.1542), an illegitimate son of King Edward IV, and his wife Honora Grenville, widow of Sir John Bassett (1462–31 Jan 1529) of Umberleigh, of "The site, church, etc., and demesne of Frithelstock Priory, the manor, rectory and advowson of the vicarage of Frithelstock and the manor of Broadwoodwidger, all late of the priory". The estate was valued at about £92. Risdon reckoned the priory and barton thus granted to contain a thousand acres. Much of the negitiations fixing the purchase price payable by Lord Lisle to the crown are recorded in the Lisle Letters, the surviving correspondence between him and his London agent John Hussee. The priory lands were later owned by Robert Walpole, 2nd Earl of Orford (d.1751), son of Robert Walpole (d.1745) the first prime minister, whose wife was Margaret Rolle, suo jure 15th Baroness Clinton (1709–1781), daughter and sole heiress of Samuel