Roger de Sibton, son and heir I presume of Henry, appears to have been of age. His Bosc, within the jurisdiction of the Long Forest, was reported to be waste, and he was amerced half a merk. It would seem that this Roger de Sibeton had a quit-rent (1 lb. of cumin) from certain land at Hisland and Aston (near Oswestry). He was probably Mesne Lord, under Fitz Alan, and over a younger branch of his own family. About 1270 the third John fitz Alan released this quit-rent as a favour to Haughmond Abbey, which had now obtained the lands so charged.
The Feodary, drawn up on John fitz Alan's death in 1272, enters Roger de Sibeton as holding Sibeton, half Witestonestowe (Wistanstow), half Brome, Clunbury, Streford, La Merse (Marshbrook), and Brompton (Little Brompton);- all by service of one knight, due to the deceased Baron's estate. In the subsequent partition, the whole of Roger de Sibeton's services were allotted to the King as Custos of John fitz Alan's heir.
At the Assizes of October 1272 Roger de Sibeton sat as 5th Juror for Purslow Hundred, and was himself presented as tenant of a knight's-fee and yet no knight. On July 21, 1281, as Sir Roger de Sibbeton, he attests a Stokesay Deed: on July 18, 1283, he sat as Foreman of a local Jury, and this is the last I hear of him. 1
Orthographic variations: DE SIBTON, SIBETON