A photostat facsimile of the fifteenth century Shrewsbury School MS XI, which contains Welsh versions of 'Officium Beatae Mariae', the Credo, the Spirit of Guido, the Gospel of Nicodemus, the Crucifixion, Elen's Finding of the Cross, the Vision of Paul, etc., and which is closely allied to Peniarth MS 191, the bulk of which is also of the fifteenth century.