"LYTHIAN'S, ST., in the Cwmwd of Is Caeth, Cantref of Brenhinol (now called the Hundred of Dinas Powys), County of GLAMORGAN, South Wales: a discharged Vicarage valued in the King's Books at £6..1..3: Patron, The Rev. Morgan Deere. The Resident Population of this Parish, in 1801, was 72. The Money raised by the Parish Rates, in 1803, was £54..0..8 1/2. It is 6m. W. S.W. from Caerdiff. This Parish contains about 1000 acres of Land, all inclosed. Here is a Druidical Altar. According to the Diocesan Report, in 1809, the yearly value of this Benefice, arising from Tythes, and Glebe, was £115..16..4." From A Topographical Dictionary of The Dominion of Wales by Nicholas Carlisle, London, 1811.
"LYTHAN'S, ST. (ST. LYTHIAN), a parish in the hundred of DINAS-POWIS, county of GLAMORGAN, SOUTH WALES, 6 miles (W. S. W.) from Cardiff, containing 103 inhabitants. It is situated on elevated ground, overlooking both sides of the Vale of Glamorgan, about a mile south of the turnpike road leading from Cardiff to Cowbridge : the common commands one of the most extensive, luxuriant, and diversified prospects in South Wales. The living is a discharged vicarage, endowed with the great tithes, in the archdeaconry and diocese of Llandaf, rated in the king's books at £ 6. 1.3., and in the patronage of the Archdeacon of Llandaf. A school for all the poor children of this parish is supported by the Hon. Mrs. Grey, of Dyfryn House, an ancient mansion in the vicinity, formerly belonging to the Price family, the heiress of which conveyed it by marriage to the Greys. The sum of £ 10 was bequeathed by Mr. Thomas Williams, for the benefit of the poor. There is a cromlech on St. Lythan's common. The average annual expenditure for the maintenance of the poor amounts to £60. 11." ( A Topographical Dictionary of Wales by Samuel Lewis 1833)