There were 3 mental hospitals in Bridgend.
1) Parc - now Parc Prison.
2) Glanrhyd - still there
3) Pen Y Fai - now demolished and is a housing estate.
Glanrhyd and Pen Y Fai hospitals were on oposite sides of the main road from Bridgend to Aberkenfig / Brynmenyn area. It is possible that they would come under Newcastle Higher.
Came across this from another posting...
Glamorgan County Asylum
Opened at Angleton, Bridgend, 4.11.1864 (Renamed Glanrhyd by or in 1948) map
1881 Census: Glamorgan County Lunatic Asylum, Near Bridgend, Newcastle Higher, Glamorgan, Wales. Henry Turnbull Pringle (married, aged 40) was the Physician Superintendent. His wife doe not appear to have been at home on census night and a nurse was caring for his one year old son.
1887 An additional hospital, Parc Gwyllt opened nearby. (renamed Parc by or in 1948) map (Angleton can be seen on the west border of the map)
Known as Angelton and Parc Gwyllt from 1887 to 1922
Known as Glamorgan County Mental Hospital from 1922 to 1948
1901 There is an entry for Glamorgan County Lunatic Asylum, Higher Coyty in the 1901 Census
1905 civil parish of Bridgend formed out of portions of the parishes of Newcastle and Coity.
1911 Encyclopedia Britannica: Bridgend (Welsh name Penybont-ar-Ogwr) is a market town straddling the river Ogwr. 1901 population of urban district: 6,062. "Just outside the town at Angelton and Parc Gwyllt are the Glamorgan county lunatic asylums."
1934 Penyfai, a new hospital for admissions, opened on the Glanrhyd site
1948: Glanrhyd and Parc and Penyfai became Morgannwg Hospital
In 1979, Morgannwg Hospital consisted of Glanrhyd Hospital (416 beds) and Penyfai (161 beds), both at Bridgend, CF31 4LN, Mid Glamorgan, and Parc Hospital (845 beds), Bridgend, CF35 6AP
Parc and Penyfai are closed. Glanrhyd Hospital is active
Source...
http://www.mdx.ac.uk/WWW/STUDY/4_13_TA.htm#Bridgend