The following were some of the endowments of the Abbey:—Half the tithes of Wrexham, bestowed on it by Reyner, bishop of St. Asaph, who died in 1224; and the other half by his successor, Bishop Abraham, in 1227. And Howel ap Ednyfed, another bishop, endowed it with those of Llangollen. The monks also obtained the patronage of many other livings, such as Wrexham, Rhiwabon, Chirk, Llansantffraid, and Llandegla; but their title to these, as well as to Llangollen, was disputed by Bishop Anian, commonly known by the name of _Y Brawd Du o Nannau_, or the Black Brother of the House of Nanney, a dominican consecrated in 1268, who brought his cause before the Pope’s delegate, the official of Canterbury, and the Abbot of Taley, in Carmarthenshire, and obtained a decision in favour of himself and his successors; but as there was some doubt as to the patronage of the church of Llandegla, they allotted in lieu of it to the Abbey a third of the tithes of Bryneglwys. In the year 1291, the abbot was found to have, near the monastery, a grange, with three plough lands, a mill, and other conveniences, valued at £3; the grange of Bodëang, Tregam, Rudrym, and Backeton, set for £5 10s.; the dairy farm of Nant, and the grange of Nystroyz, Convereth, and Grenny-champt, set for £3 19s. 8d.; also the grange of Wyrcesham, consisting of one plough land and some pasture, valued at 15s., and thirty cows at the expense of 30s. The freemen of Llangollen made a grant of a fishery to the monks, in a part of the Dee near the town, and, for want of a seal of their own, they affixed to their grant that of Madoc, the founder of the Abbey. The monks soon afterwards erected new works on the river, for the purpose of taking the fish; this caused a dispute between them and the freemen; and these last referred the matter for decision to the abbot and five monks of their own choice, who were to determine the matter upon oath. Madoc and his secretary, John Parvus, appointed a day for the purpose; the assembly was held, the oaths solemnly administered, and the abbot and monks made the decision (as might have been expected), in their own favour. They alleged they had bought the right of erecting what works they pleased, and of repairing them, from the heirs of Llangollen. Madoc confirmed the decree, and the donation of a fishery, by an instrument dated 1234.