As one of four keepers of the King's Treasure he brought the jewels of Leo de Melcstret to the Wardrobe and delivered large sums to the Treasurer William de Haverhull. In London he was among the dignitaries invited to witness the conveyance by Odo, melter in the king's Exchequer, of his rights to Edward son of Odo the goldsmith, as the grantor prepared to leave for the Holy Land. Late in 1241 he joined distinguished company to witness the king's grant to the Count of Aumale, and in January 1241/42 (at Westminster) witnessed the King's renewal of franchise to the city of Cork. De Criol was granted a fee in Everlond (Overland, in Elham, Kent, close to a royal park) which was forfeited by Master Simon de Steyland the king's clerk: and this de Criol's heir still retained in 1253.