THE provision of a new catalogue for the Yates Thompson manuscripts now in the British Library, taking into consideration the many advances in scholarship which have taken place since the collector himself issued his original catalogues at the beginning of the century, was among the major ambitions which Derek Turner did not live to fulfil. The forty-six manuscripts which the collector's widow bequeathed to the nation in 1941, together with the half-dozen volumes already in the department, represent a period of some six centuries and come from all over Europe, offering an unusual opportunity for a survey of the present state of knowledge over a very wide spectrum. The accumulation of notes and descriptions which Derek left will of course be utilized in the catalogue when it eventually appears.