GUISBOROUGH or GUISBROUGH, an urban district and market town, Cleveland parliamentary division, North Riding of Yorkshire, England, Io m. E.S.E. of Middlesbrough by a branch of the L.N.E. railway. Pop. (1931) 6,306. It lies in a narrow, fertile valley at the north foot of the Cleveland hills. Ruins of an Augustinian priory, founded in I I 29, are situated near the east ern extremity of the town. The church contains some fine deco rated work, and the chapter house and parts of the conventual buildings may be traced. Considerable fragments of Norman and transitional work remain. Among the historic personages buried within its walls was Robert Bruce, Lord of Annandale, the com petitor for the throne of Scotland, and the grandfather of King Robert the Bruce. The church of St. Nicholas is Perpendicular, greatly restored. The grammar school was founded in 1561. About I m. S.E. of the town is a sulphurous spring discovered in 1822. The neighbouring district is rich in iron-stone and its working forms the chief industry of the town. There are also tanneries and breweries.