The comprehensive gazetteer and bibliography of the medieval castles, fortifications and palaces of England, Wales, the Islands.
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In 1317 Sept 26, Willielmus de Monte Acuto (William Montague) was granted, by Edward II, (In year 11 of his reign) a Royal licence to crenellate Kersington (Cassington Manor House)
Licence for William de Monte Acuto to crenellate his manor of Kersington, co. Oxford. By K. (CPR)

Willielmus de Monte Acuto ... manerium ... Kersington, Oxon. (Turner and Parker)

Granted at York. Grant by King.


This was, according to Parker, Garsington where a C17 house is constructed on the site of an earlier house, but the modern scholarship places the site at Cassington.

Original source is;

(In fact, the original source given is usually a transcription/translation of what are precious medieval documents not readily availably. It should be noted that these transcription/translations often date to the nineteenth or early twentieth centuries and that unwitting bias of transcribers may affect the translation. Care should also be taken to avoid giving modern meaning to the medieval use of certain stock words and terms. Licentia is best translated as 'freedom to' not 'permission'.)

Significant later sources are;

Montagu, William, second Lord Montagu (c.1285–1319)
Prominent soldier and courtier, appointed steward of the royal household in 1316.

About 1269 William Montagu exchanged Cassington with Philip Basset and his wife Ela Longespee for their lives. Philip died in 1271, and in 1279 Ela held Cassington. On her death in 1297 the manor reverted to William Montagu's son Simon, Lord Montagu, from whom it passed to his son William (d. 1319); William's relict Elizabeth evidently retained the manor in dower until her death in 1354, when it reverted to William's grandson William (d. 1397), earl of Salisbury. (VCH)

Biographical source include;

More information about licences to crenellate can be found here.

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Record created by Philip Davis. This record last updated on Sunday, October 4, 2015.