"SULLY, in the Cwmwd of Is Caeth, Cantref of Brenhinol (now called the Hundred of Dinas Powys), County of GLAMORGAN, South Wales: a discharged Rectory valued in the King's Books at £11..9..9 1/2: Patron,Thomas Drake Tyrwhitt Drake, Esq.: Church dedicated to St. John the Baptist. The Resident Population of this Parish, in 1801, was 164. The Money raised by the Parish Rates, in 1803, was £105..13..3 1/2, at 5s. in the pound. It is 6 1/2 m. S.W. from Caerdiff. This Parish contains about 900 acres of inclosed and cultivated Land, and from fifteen to twenty acres which are uncultivated. It is situate upon the Bristol Channel. According to the Diocesan Report, in 1809, the yearly value of this Benefice, arising from Tythes, and Glebe, was £133..9..6. There is a Ferry from hence for Cattle to the County of Somerset. The Castle and Lordship formerly belonged to one of the Norman Conquerors. " From: A Topographical Dictionary of The Dominion of Wales by Nicholas Carlisle, London, 1811.
"SULLY (SULWY), a parish in the hundred of DINAS POWIS, county of GLAMORGAN, SOUTH WALES, 6 1/2 miles (S. S. W.) from Cardiff, containing 197 inhabitants. This parish is situated on the shore of the Bristol channel, by which it is bounded on the south, and nearly opposite to a small island of the same name. It is of very limited extent, comprising only a moderate portion of arable and pasture land, which is enclosed and in good cultivation. The Scottish system of agriculture, introduced here by Mr. Thomas, of Sully House, who is regarded as one of the best agriculturists in South Wales, is generally adopted in the parish, and has succeeded well. The living is a discharged rectory, in the archdeaconry and diocese of Llandaf, rated in the king's books at £ 11. 9. 9 1/2., and in the patronage of Thomas Tyrwhitt Drake, Esq. The church, dedicated to St. John the Baptist, is a neat edifice, and is kept in excellent repair : adjoining it is a handsome parsonage-house, occupied by the Rev. Mr. Conybeare, the present rector, who has greatly distinguished himself by his geological researches. Mr. John Howel, in 1775, bequeathed £ 10 to the poor of this parish not receiving parochial relief. The average annual expenditure for the maintenance of the poor is £ 92. 12." ( A Topographical Dictionary of Wales (1833) by Samuel Lewis)