"PETERSTONE upon ELAY, in the Cwmwd of Uwch Caeth, Cantref of Brenhinol (now called the Hundred of Dinas Powys), County of GLAMORGAN, South Wales: a Rectory valued in the King's Books at £7..12. 8 1/2: Patron, Sir John Aubrey, Bart.: Church dedicated to St. Peter. The Resident Population of this Parish, in 1801, was 220. The Money raised by the Parish Rates, in 1803, was £155..1..6 1/4, at 2s. ld. per acre. It is 8 m. W. from Caerdiff. This Parish contains about 1200 acres of Land. It is situate upon the river Elay."
From: A Topographical Dictionary of The Dominion of Wales by Nicholas Carlisle, London, 1811