The collegiate church of St. Buryan is undoubtedly an early instance of the conversion of a Celtic monastery to a recognised English type. King Athelstan by charter gave a small piece of his land in a place which is called the church of St. Berrian ... to be free of all taxation unless the clerks who had promised him their prayers, viz. 100 masses, 100 psalters and daily supplications failed, to perform their task. The place which is called the church of St. Berrian was evidently Eglosberria or Eglosveryan, of which we have already spoken. In later times it was advantageous to the dean and his fellows to cite Athelstan as their founder and their church as a royal chapel. All that the Saxon King did for them was probably to guarantee to them security of tenure for the lands which they already held and freedom from payment of geld. The Canons of St. Crantock who held the manor of Langorock at the time of the Survey (1086) also survived the various changes made in the constitution of their community until their dissolution in 1536. Robert, Count of Mortain, had already seized their lands when the Survey was made. His son, Count William, founded the Cluniac house at Montacute in Somerset, and to it he is said to have given the church of St. Crantock. It is certain that in 1236 the prior of Montacute transferred the church and its possessions to William Briwer, bishop of Exeter. The bishop thenceforth became patron of the deanery and prebends. In 1291 there were on the foundation a dean and nine prebendaries. St. Crantock had become a typical collegiate church. The several stages through which it passed leave no doubt that as Langorock it had established its claim to considerate treatment by Saxon and Norman alike.