The earliest identified surviving manuscripts from Glastonbury Abbey date from the ninth and tenth centuries, but there are reliable post-Conquest traditions claiming that valuable books were found at the monastery as early as the reign of Ine, king of the West Saxons (688–726). By the tenth century at the latest there are reports of an ‘Irish school’ at Glastonbury, famous for its learning and books, and St Dunstan's earliest biographer, the anonymous. B., relates that Dunstan himself studied with the Irish at Glastonbury. During Dunstan's abbacy (940–56) – that is, at the period when most historians would place the beginnings of the English tenth-century reform movement – there was a general revival at Glastonbury which included a concerted policy of book acquisition and the establishment of a productive scriptorium. Not surprisingly, Dunstan's abbacy was viewed by the community ever afterwards as one of the most glorious periods in the early history of the monastery, especially since the later Anglo-Saxon abbots showed a marked falling off in devotion and loyalty to the intellectual inheritance of their monastery. Æthelweard and Æthelnoth, the last two Anglo-Saxon abbots, were especially reprehensible, and confiscated lands and ornaments for the benefit of their own kin. Nor did the situation improve immediately after the Conquest: the first Norman abbot, Thurstan, actually had to call in soldiers to quell his unruly monks. In spite of these disruptions, a fine collection of pre-Conquest books seems to have survived more or less intact into the twelfth century; when the seasoned traveller and connoisseur of books, William of Malmesbury, saw the collection in the late 1120s he was greatly impressed: ‘tanta librorum pulchritudo et antiquitas exuberat’.
