William of Newburgh

William of Newburgh or Newbury (from Guillelmus Neubrigensis; 1136? – 1198?), also known as William Parvus, was a 12th century English historian and Augustinian canon from Bridlington, Yorkshire.

His major work was Historia rerum Anglicarum or Historia de rebus anglicis ("History of English Affairs"), a history of England from 1066 to 1198. The work is valued by historians for detailing The Anarchy under Stephen of England. It is written in an engaging fashion and still readable to this day, containing many fascinating stories and glimpses in to 12th-century life. He is a major source for stories of Medieval revenants, those souls who return from the dead, and the only source for the bishop-pirate Wimund.

The nineteenth-century historian Edward Augustus Freeman expressed the now-outdated opinion that William was "the father of historical criticism". Newburgh saw his own work as being based on reliable sources, unlike Geoffrey of Monmouth's History of the British Kings, of which Newburgh was critical, saying "only a person ignorant of ancient history would have any doubt about how shamelessly and impudently he lies in almost everything". He criticized Geoffrey for writing a history that conflicted with the accounts found in the writing of Bede.

Because belief in souls returning from the dead was common in the 12th century, Newburghs Historia briefly recounts stories he heard about revenants, as does the work of Walter Map, his southern contemporary. Although they form a minor part in each work, these folklore accounts have attracted attention within occultism. He also described the arrival of green children from "St. Martin's Land" (I.27) and other mysterious, wondrous occurrences. While he says that these have an apparent signification, he does not explain what that meaning might be.

He also composed a lengthy Marian exposition on the Song of Songs and three sermons on liturgical texts and Saint Alban.