Release by William Owen ap Tudur Vychan to Richard Bulkeley, archdeacon of Anglesey, of his lands in Dinsylwy, including ten messuages, 200 acres arable, &c., the advowson of the church of St Michael in Dinsylwy, together with his interest in the prebend in the collegiate church "Castri Kebii” [Caergybi, Holyhead] 14 March 1508-1509