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Cof Cymru: National Historic Assets of Wales · Wales

Felin Isaf, including former Water Mill to rear

St. David's and the Cathedral Close, Pembrokeshire, Wales

A Grade II listed building in Porthclais, St. David's and the Cathedral Close, Pembrokeshire, designated on 1 March 1963.

Ordnance Survey six-inch map, 2nd edition (1888–1913) covering the location of Felin Isaf, including former Water Mill to rear, St. David's and the Cathedral Close, Pembrokeshire, with a pin at the register's coordinates
Ordnance Survey six-inch map, 2nd edition (1888–1913), covering this location. Courtesy of the National Library of Scotland. The pin is ours, placed from the register's coordinates.

The record

Designation
Listed building, Grade II
Broad class
Industrial
Date of designation
1 March 1963
Locality
Porthclais
Community
St. David's and the Cathedral Close
Unitary authority
Pembrokeshire
Country
Wales
Coordinates
51.87783, -5.27807
Cadw reference
12690

Slide toward Today to fade the historical sheet and see the modern map underneath.

David Rumsey Map Collection, Stanford Libraries

5 historical maps cover this location, the earliest the 1608 map "(13) Cambriae Typus." (David Rumsey Map Collection, Stanford Libraries).

Historical maps covering this location

  • 1608 · (13) Cambriae Typus. (David Rumsey Map Collection, Stanford Libraries)
  • 1636 · Cornubia : Devonia, Somersetus, Dorcestria, Wiltonia, Glocestria ... (David Rumsey Map Collection, Stanford Libraries)
  • 1637 · Particular description of Wales. Cambria seu Wallia (David Rumsey Map Collection, Stanford Libraries)
  • 1898 · 209 St David's (Hills) (David Rumsey Map Collection, Stanford Libraries)
  • 1901 · Sheet 13. (David Rumsey Map Collection, Stanford Libraries)

Get directions ↗

This record in Cadw's own full report ↗

Cadw's description

Situated down drive some 250m SE of Pont Clegyr-Boia on St David's to Treginnis lane.

Early and later C19 mill and mill house on River Alun. Mill building to rear probably early C19, mill house mid to later C19, though a mill has been recorded here from 1326.

Two-storey three-window rubble stone house, formerly roughcast, with imitation slate roof and roughcast end stacks. C20 timber sashes, 9-pane above, 12-pane below with cambered brick heads. Centre window replaces ledged door and windows have all been replaced since 1981. Roughcast end walls and lean-to on E end.

Mill building: behind is rubble stone building with S gable over mill stream, former overshot water-wheel has gone. One small fixed light at low level, one 2-pane fixed light with cambered brick head above. Evidence in gable that eaves have been raised. W side is built out since 1981 with big French windows, original wall survives within. E side has lean-to to left and recessed porch with C20 double doors.

Mill is fed by mill-leat from Cathedral Close and was the Bishop's Mill, also known as Dewiston, Dewston or Lower Mill.

Complete mill-machinery: survives within mill section and there is said to be a date 'I Roberts 1810'.

Nearby in the register

Other entries of the same register within about three miles of this one, by straight line.

Designated Historic Asset GIS Data, The Welsh Historic Environment Service (Cadw), 2026-09-07, licensed under the Open Government Licence http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/ Cadw, the Welsh Historic Environment Service · Open Government Licence v3.0
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