Friday, 13 April 2018

Mapping Mountains – Significant Name Changes – 100m Twmpau

Cae Nesaf Glanrafon (SH 317 387)

There has been a Significant Name Change to a hill that is now listed in the 100m Twmpau, with the summit height, drop and status of the hill being confirmed by LIDAR analysis conducted by Myrddyn Phillips.

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

100m Twmpau – All Welsh hills at and above 100m and below 200m in height that have 30m minimum drop, with the word Twmpau being an acronym standing for thirty welsh metre prominences and upward.  With an accompanying sub category entitled the 100m Sub-Twmpau consisting of all Welsh hills at and above 100m and below 200m in height that have 20m or more and below 30m of drop.

The hill is adjoined to the Pen Llŷn range of hills which are situated in the north-western part of North Wales (Region A, Sub-Region A1), and is positioned overlooking the B 4354 road which is to its immediate north and the A 497 road which is to its south-west and has the small community of Nefyn to its north-west. 

The hill did not appear in the 100m P30 list on Geoff Crowder’s website as it did not meet the criteria set for the accompanying sub list which was entitled Hills to be surveyed, however when this sub list was standardised and interpolated drop values later added the hill was only listed with an estimated c 18m of drop, and it was LIDAR analysis that classified it to the 100m Sub-Twmpau category.

As the summit of this hill comprises bounded land the details for it were examined on the Tithe map.  The term Tithe map is generally given to a map of a Welsh or English parish or township and which was prepared after the 1836 Tithe Commutation Act.  This act allowed tithes to be paid in cash rather than goods.  The Tithe maps gave names of owners and occupiers of land in each parish and importantly for place-name research they also included the name of enclosed land.  This enclosed land is usually based on a field system, however not every field is given a name, but many are and especially so in Wales.

Extract from the Tithe map

Extract from the Tithe map

The enclosed land where the summit of this hill is situated is given the number 171a and the adjacent field to the south the number of 171 on the Tithe map, this can be cross referenced against the apportionments; it is these apportionments that give the name of the owner or occupier of the land as well as the name of the land.  The land where the summit of this hill is situated and that of the southerly field is named as Cae nesa glanrhafon, with the details on the Tithe map appearing in the county named as Carnarvon [sic] and in the parish of Bodean.

Extract from the apportionments

Therefore, the name this hill is now listed by in the 100m Twmpau is Cae Nesaf Glanrafon, and this name was derived from the Tithe map.

The full details for the hill are:

Group:  Pen Llŷn

Name:  Cae Nesaf Glanrafon

Previously Listed Name:  not previously listed 

Summit Height:  107.4m (LIDAR)

OS 1:50,000 map:  123

Summit Grid Reference:  SH 31707 38723 (LIDAR) 
Drop:  20.7m (LIDAR)

Myrddyn Phillips (April 2018)

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