Abstract
As a contributory step toward a new edition of Du Cange's Glossarium mediae et infimae latinitatis, planned by the International Association of Academies, the British Academy has undertaken to publish a critical edition of mediaeval glossaries. The most important of these glossaries, because it constitutes the parent-compilation from which subsequent compilers of glossaries drew their material, is that pair known as Abstrusa and Abolita, found combined in the Vatican MS. 3321, which is the oldest extant MS. of purely Latin glossaries. It is with the date and home of this MS. that the present note is concerned