This group of manuscripts, which Sir John Bernard Bosanquet collected at Dingestow Court, Monmouthshire, was acquired in 1916. It includes an early Welsh translation of Geoffrey of Monmouth's Historia Regum Britanniae (NLW MSS 5266B), written in the fourteenth century. It was subsequently edited by Henry Lewis and published under the title of Brut Dingestow by the University of Wales Press in 1942.
