TRYDDIN (TREUDDYN), a chapelry (parochial), in the parish and hundred of MOLD, union of WREXHAM, county of FLINT, NORTH WALES, 5 miles (S.) from Mold; comprising 1969 inhabitants, the population having increased more than a fourth since the tenses of 1831. This place, which is situated among lofty hills in a rich mineral district, in the south-eastern part of the county, abounds" with coal and iron-stone of superior quality; and within the last few years some very extensive works have been established, which are carried on with very great success. The Coed Talon collieries and ironworks were first erected in 1817, when the proprietors opened some mines of coal, which, being found of good quality and in great abundance, induced them to erect furnaces, Ni 1821, for the manufacture of iron. These works, after being conducted with profit for some time, were, in 1825, sold to the Welsh Iron Company, who erected additional furnaces, and greatly extended the mines and every department of the establishment, and in 1830 sold them, under the provisions of an act of parliament, to Edward Oakeley, Esq., the present proprietor. The principal produce of the works is pig iron of a peculiar quality, which is in great demand, and is much used in making lighter articles of machinery; and the whole of the iron manufactured here is purchased by the makers of machinery at Liverpool and Manchester. About six hundred and fifty men are constantly employed in the collieries and other works. In the coal and iron-stone shale numerous marine and vegetable impressions are found, and, in some instances, fossilized bones and shells. The living is a perpetual curacy, endowed with £300 royal bounty, and £400 parliamentary grant; net income, £78, with a glebe-house: patron, Bishop of St. Asaph: the tithes have been commuted for a rent-charge of £381. 12. 11., of which a sum of £317. 18. 8. is payable to Mr. Knight, the impropriator, and £63. 14. 3. to the incumbent. The church, dedicated to St. Mary, is a neat small edifice, in good repair. A school containing about 35 children, is supported by an endowment of £9. 10. per annum, a portion of the rent of about 131 acres of land, in the parish of Holt, now producing £25 per annum, granted for the purpose by Griffith Roberts, in 1664, who also directed £3 a year should be paid to the curate forpreaching six lectures. From the sale of timber on the property, in 1803, a sum of £40 was raised, with which a piece of ground on Lough-ton Mountain was purchased, now yielding a rent of 1. 9., which is divided between the two schoolmasters of this place and Nerquis. A school-house was erected here in 1753, by Mrs. E. Hyde, of Nerquis; and her successor, Mrs. Giffard, built a residence for the master in the garden adjoining it. In another school about 40 children are instructed at the expense of their parents; and two Sunday schools, gratuitously conducted by dissenters, consist of 310 males and females. Some donations, producing about £2 per annum, have been lost to the poor, owing to the insolvency of a churchwarden. .0ffa's Dyke, which commences on the bank of the Wye, in Herefordshire, after passing through that county, and those of Radnor, Montgomery, Salop, and Denbigh, appears to terminate very abruptly on a farm called Cae Dwn, about a mile from the chapel of this place. But there is every probability that Offa completed this great work by continuing it to the sea near the Point of Air, in the parish of Llanasaph, as there are several remains of an earthwork in the line between that place and Tryddin, still retaining the appellation of Ciawdd Offa, especially near the race-course between Holywell and Caerwys, where it has been partially levelled only within these few years, and also below the stables, and to the north of the grand stand.