Dugdale, William, Sir. Wyrthorp, Wridthorp, or Woolsthrop Nunnery, near Stanford, in Northamptonshire in Dugdale's Monasticon Volume 4 Vol. 4: 266-68

[Wyrthorp, Wridthorp, or Woolsthrop Nunnery, near Stanford, in Northamptonshire]
With excerpts from primary sources in Latin.