"Of this Guarine, it is stated, that, having heard that William, a valiant knight, sister's son to Pain Peverell, Lord of Whittington, in Shropshire, had two daus.,one of whom, Mallet, had resolved to marry none but a knight of great prowess, and that her father had appointed a meeting of noble men at Peverel's Pace, on the Peke, from which she was to select the most gallant, he came thither, when, entering the lists with a son of the King of Scotland and with a Baron of Burgundy, he vanquished them both and won the fair prize with the lordship and castle of Whittington. At this place he subsequently took up his abode and founded the Abbey of Adderbury.
He was s. at his decease by his son, Sir Fulke Fitz-Warine.