 In 985, Oswald invited Abbo of Fleury to come to Ramsey to help found the monastic school there. Abbo was at Ramsey from 985 to 987, where he taught computus, or the methods for calculating Easter. It was also often used in trying to calculate the date of the Last Judgment. A surviving manuscript gives a list compiled by Oswald, setting forth estates that had been taken from the diocese of York.
