What did Pseudo-Ingulf write that is an important primary source for English medieval history, particularly the late 15th century?
Pseudo-Ingulf Pseudo-Ingulf is the name given to an unknown English author of the "Historia Monasterii Croylandensis", also known as the Croyland Chronicle. Nothing certain is known of Pseudo-Ingulf although it is generally assumed that he was connected with Croyland Abbey.
White Book of Rhydderch The White Book of Rhydderch (Welsh: "Llyfr Gwyn Rhydderch", National Library of Wales, Peniarth MS 4-5) is one of the most notable and celebrated surviving manuscripts in Welsh. Mostly written in southwest Wales in the middle of the 14th century (c. 1350) it is the earliest collection of Welsh prose texts, though it also contains some examples of early Welsh poetry. It is now part of the collection of the National Library of Wales, having been preserved in the library at Hengwrt, near Dolgellau, Gwynedd, of the 17th century antiquary Robert Vaughan, who inherited it from the calligrapher John Jones and passed it to his descendants. The collection later passed to the newly established National Library of Wales as the Peniarth or Hengwrt-Peniarth Manuscripts.