Mapping Mountains – Significant Name Changes – Y Trichant – The 300m Hills of Wales

Carreg Crwys (SN 632 462) 

There has been a Significant Name Change to a hill that is listed in the Y Trichant – The 300m Hills of Wales, with the summit height, bwlch height and their locations, the drop and status of the hill derived from detail on contemporary maps produced from Ordnance Survey data. 

The criteria for the list that this name change applies to are: 

Y Trichant – The 300m Hills of Wales – Welsh hills at or above 300m and below 400m in height that have 30m minimum drop, with an accompanying sub list entitled the Sub-Trichant, with the criteria for this sub category being all Welsh hills at or above 300m and below 400m in height with 20m or more and below 30m of drop.  The list is authored by Myrddyn Phillips with the Introduction to the list and the renaming of it appearing on Mapping Mountains on the 13^th May 2017, and the Introduction to the Mapping Mountains publication of the list appearing on the 1^st January 2022. 

Y Trichant - The 300m Hills of Wales by Myrddyn Phillips

The hill is adjoined to the Esgair Wen group of hills, which are situated in the central part of South Wales (Region B, Sub-Region B1), and it is positioned with minor roads to its north-west, south and east, with the A482 road farther to its south-west, and has the town of Llanbedr Pont Steffan (Lampeter) towards the west north-west.

The hill appeared in the original 300m height band of Welsh P30 hills published on Geoff Crowder’s v-g.me website, under the transposed name of Allt Esgair-crwys, which is a prominent name that appears to the south-east of this hill on the contemporary Ordnance Survey 1:25,000 Explorer map.

Allt Esgair-crwys

366m

SN633463

146

199

During my early hill listing I thought it appropriate to either invent a name for a hill, or use a name that appeared near to the summit of the hill on Ordnance Survey maps of the day.  My preference was to use farm names and put Pen, Bryn or Moel in front of them or as in this instance transpose a prominent name that appears on the contemporary Ordnance Survey 1:25,000 Explorer map and use it for that of the hill.  This is not a practice that I now advocate as with time and inclination place-name data can be improved either by asking local people or by examining historic documents, through this form of research an appropriate name for the hill can usually be found.

Extract from the Ordnance Survey 1:25,000 Explorer map

Since the original publication of the Welsh P30 lists on Geoff Crowder’s v-g.me website there have been a number of maps made available online.  Some of these are historic such as the series of Six-Inch maps on the National Library of Scotland website.  Whilst others were digitally updated such as the Ordnance Survey Vector Map Local that was hosted on the Geograph website and which was entitled the Interactive Coverage Map, whilst others are current and digitally updated such as the interactive mapping on the Magic Maps and WalkLakes websites, and it is the series of Ordnance Survey Six-Inch maps that form the basis of the change in the listed name of this hill. 

Extract from the Ordnance Survey series of Six-Inch maps

The Ordnance Survey series of Six-Inch maps formed the base map Ordnance Survey used for many decades leading to the production of the 1:10,000 Series of maps, both have now been superseded by the digitised Master Map.  The series of Six-Inch maps are excellent for name placement and especially so compared to the contemporary Ordnance Survey 1:25,000 Explorer map, and it is the series of Six-Inch maps that indicate the name of Allt Esgair Crwys to be applicable to land situated away from the summit of this hill and associated with the farm of Esgair Crwys, whilst this series of maps indicate the name of Carreg Crwys to be the main named feature on the upper part of this hill.

Therefore, the name this hill is now listed by in the Y Trichant – The 300m Hills of Wales is Carreg Crwys and this was derived from the Ordnance Survey series of Six-Inch maps. 

 

The full details for the hill are: 

Group:  Esgair Wen 

Name:  Carreg Crwys 

Previously Listed Name:  Allt Esgair-crwys 

OS 1:50,000 map:  146

Summit Height:  366m (spot height)                                                           

Summit Grid Reference:  SN 63282 46271 (hand-held GPS via DoBIH) 

Bwlch Height:  c 328m (interpolation) 

Bwlch Grid Reference:  SN 63059 46363 (interpolation) 

Drop:  c 38m (spot height summit and interpolated bwlch) 

 

Myrddyn Phillips (May 2023)