THE CASTLE.
The visible remains of this ancient fortress, so celebrated in border story, are very scanty, and are confined to the central mound, and to some fragments of the rude but substantial keep which was placed upon it. The castle stood on ground rather higher than, and on the north-western edge of, the town, completely commanding it; and it is only of late years that its site has been nearly surrounded by buildings. The church is about half a mile distant to the south, the town intervening between the two. From the mound, the view to the east and south is very extensive; to the west it is shut in by the wooded heights of the Denbighshire border, crowned by Offa’s Dyke, at a distance of about two miles. To the north, a mile or so distant, is the detached hill and camp of Hên Dinas, or Old Oswestry, which is in part obscured by the still nearer but lower eminence of Llwyn. No water enters into the landscape, nor is there any considerable stream near at hand. Wat’s Dyke lies close to the east.
The castle mound, though standing on high ground, is wholly artificial, and rather oval at its summit, which is about 60 feet by 100 feet. It is about 30 feet high, and perhaps 200 feet diameter at its present base. On its table top are some fragments of masonry, composed of large rolled boulders, laid in a thick bed of mortar; very rude but very strong work. One fragment, which in places is about 8 feet thick, is 9 feet or 10 feet high; and near it are two other large masses, one of which at least is overthrown. The keep was of the shell type, and probably polygonal. The slopes are covered with bushes, much obscuring the surface, but there seems to be a further trace of masonry on the south-west side. The moat, out of which the mound rose, has been completely filled up, and all trace of the outer ward, its ditches, banks, or buildings, has been utterly removed. Nothing is known of a well. The entrance was probably on the south-west side. Gallowtree bank—a name preserved in the southern suburb—preserves the memory of the lord’s power, as does Oswald’s well of the ecclesiastical legend.
It is probable that the masonry remaining is the work of William Fitz-Alan, who, after 1155, confirmed a previous gift of the church of Oswestry to Shrewsbury Abbey. He died 1160, in which year the Pipe roll designates Oswestry as “Blanc-Minster.” On his death, Guy L’Estrange became custos of the Castles of Clun, Ruthyn, and Blanc-Minster, and works were in progress at the latter. The livery allowed for the garrison was £18. 5s. per annum. In July, 1165, Henry II. was encamped near Oswestry, but his advance was checked by the Ceiriog river, on which he retired to Chester.
Guy L’Estrange continued to be custos of the Fitz-Alan estates and castles until 1175, during which time very large sums were expended by the Crown upon Oswestry, apparently about £2,000. A well cost £5. 8s., palisades 40s. and £2. 6s. 8d. A house was built within the walls. The regular garrison was a knight, two porters, two watchmen, and twenty men-at-arms, costing £48. 13s. 4d. per annum. In 1188, William Fitz-Alan received Archbishop Baldwin and Giraldus in the castle. On his death, in 1210, King John stepped in, and Robert de Vipont was in charge in 1212, and in 1213 and 1214 John Mareschal and Thomas de Erdington, who had purchased the wardship during the minority of William Fitz-Alan, who, however, died under age at Clun in 1215. In 1216, King John was before Clun, and (August 16) burned the town of Oswestry, and attacked the castle, but probably without success. In 1226, Oswestry was named for the place of conference between Llewellyn and the lords marchers, but the king, distrusting John Fitz-Alan, sent Hubert de Hoese with nine knights to attend it. In 1240, John Fitz-Alan’s death placed the castle again in the care of the Crown.
In 1257, Oswestry was again named for the meeting of a Welsh and English commission, and John Fitz-Alan, the new lord, had license to levy customs dues for five years, to pay for a wall round the town. At his death, in 1267, the castle was valued at £44. 12s. 5½d. per annum, and mention is made of the “walcheria” or Welshery. The wall probably proceeded slowly, for, in 1283, King Edward issued a patent, licensing the bailiffs to levy customs for twenty years, to complete the wall. Probably this was in consequence of an attack by the Welsh, who actually held the town for a short time. In 1302, on the death of Richard, Earl of Arundel, it was found that he held Oswestry Castle and its lands by the tenure of two and a half knights’ fees. There were one hundred and forty acres of demesne land and four water-mills, but the castle was worth nothing; and its maintenance cost £10 per annum. The mills were Bailey, Weston, Cotton, and Cadogan.