"This quiet little village, on the confines of Halkyn mountain, forms a remarkably pleasant excursion from Mold, from which it is about four miles distant. ... The highway branches off to the right, along a narrow lane that will prove attractive to the botanist, and the lover of wild flowers, for here nature displays her varied chorus, according to the season of the year, primroses, hyacinths, cowslips, wild roses, honeysuckle, ferns, foxgloves, and innumerable other wayside flowers gladden the sight, and give the air the redolence of their perfume."
[From Handy Guide to Mold and the Neighbourhood ; Tweddel, 1890]
The "London Gazette" of the 27th October 1876 defined the boundaries of the new parish thus:
All that part of the parish of Northop in the county of Flint and in the diocese of Saint Asaph which is comprised within and is co-extensive with the limits of that portion of the township of Caerfallwch wherein the present incumbent of the said parish of Northop now possesses the exclusive cure of souls, or in other words, which consists of that portion of the said township of Caerfallwch which is not included within the limits of the consolidated chapelry of Saint John, Rhydymwyn, in the county and diocese aforesaid.
The new parish of Caerfallwch was created on 23 October 1876, from part of the township of Caerfallwch, which until that time had been in the parish of Northop. (The parish of Northop had already lost another part of the township of Caerfallwch in 1865, to the new parish of Rhydymwyn).
Ordnance Survey reference SJ 214687.
The church of St. Paul, Rhosesmor, was consecrated on 21 April 1876.
"The township, which preserves the name of the imposing camp on Moel-y-Gaer, has also given its name to the new parish, but the site of the Church is known locally as Rhosesmor".
[From The History of the Diocese of St. Asaph , Ven. D.R. Thomas, 1908]
The Clwyd FHS website has a photograph of the church.
Nonconformist Churches"Welsh Church Commission - County of Flint - The Statistics of the Nonconformist Churches for 1905"includes nonconformist places of worship for Caerfallwch / Rhosesmor with the returns for the Civilparish of Northop.
The following nonconformist registers for the Caerfallwch / Rhosesmor area are held at the Public Record Office, Kew.
They may be viewed on microfilm at LDS Family History Centres; and at the Flintshire Record Office, the Denbighshire Record Office and the National Library of Wales, Aberystwyth.
They have also been incorporated into the I.G.I., as part of an "official extraction" programme (as "Northop, Rhosesmor") :
On Clwyd FHS's site there is a diagram showing parish names/positions with links to pages for the parish church
Kain, R.J.P., Oliver, R.R., Historic Parishes of England and Wales: an Electronic Map of Boundaries before 1850 with a Gazetteer and Metadata [computer file]. Colchester, Essex: History Data Service, UK Data Archive [distributor], 17 May 2001. SN: 4348. Here is a gazetteer/finding aid plus a set of overview maps to accurately identify the position of parishes within the county
You can see maps centred on OS grid reference SJ214685 (Lat/Lon: 53.207720, -3.178338), Caerfallwch or Rhosesmor which are provided by: