[1] Under the patronage of the powerful de Clare family, it was one of the wealthiest monastic houses in Norman England.
In the 1130s, he wrote liturgical texts for the feast of Saint Anne for Worcester Cathedral.
[2] During a vacancy of the See of London, Osbert undertook to introduce at Westminster, the Anglo-Saxon Feast of the Conception of Mary, which had been removed from the liturgical calendar by Lanfranc.
The synod decided in favour of the feast, and Bishop Gilbert of London adopted it for his diocese.
[3] Osbert was a friend of Anselm of Canterbury, and had a deep appreciation of Anglo-Saxon saints and spirituality.