Dugdale, William, Sir. Priory of Frisetun, or Freston, in Lincolnshire, a Cell to the Abbey of Croyland in Dugdale's Monasticon Volume 4 Vol. 4: 124-29

[Priory of Frisetun, or Freston, in Lincolnshire, a Cell to the Abbey of Croyland]
With excerpts from primary sources in Latin.