In Gesta Pontificum (A. D. 1125), and also in the first recension of Gesta Regum Anglorum (same year), William of Malmesbury attributed the foundation of Glastonbury to Ini (in his spelling Ina), acting under advice of Aldhelm (patron saint of Malmesbury). By the time of writing a Life of Dunstan (date uncertain), William had obtained further information; he blames Osbern, biographer of Dunstan, for making that saint first abbot of Glastonbury, which, as he says, had passed under ecclesiastical authority long before the time of St. Patrick. From another passage of the same book we perceive that William had in contemplation a work in defence of the antiquity of Glastonbury. By a mention in the second book of the Life of Dunstan it appears that William, at the time resident in Glastonbury, had completed the promised apology. De Antiquitate, therefore, must have been completed in Glastonbury, at a time intermediate between the two books on Dunstan.