I think this was the map but it has been incorrectly archived and noted as this is not the English Channel and the land is mostly not owned by JH Tremayne.
A short history of land ownership on the Pentire Peninsula
Pentire, or Pentrire, existed as early as the 13th century, covering 1.5 Cornish acres (a Cornish acre being about 270 statute acres).
It has no record in the Doomsday book but some records do show that a family called the Pentryres owned the land. The small size of the manor suggests that this was not a typical feudal lordship. Additionally, the desmesne land was not much larger than the surrounding tenements, indicating that it was more of an autonomous family community.
Desmesne land refers to land that is retained by a lord or landowner for their own use and not granted to tenants. In feudal systems, the lord would keep a portion of the estate as their personal domain, known as the desmesne. This land was often used for the lord's residence or for farming activities that directly benefited the lord or the manor. The rest of the land might be distributed to serfs or tenants who would provide labor or other services in exchange for the right to use the land.
There are few records of the manor or how it worked but after the Pentyres the land was held for a long time by the Roscarrock family whose fortified manor between Port Quin and Port Isaac would have been their home.
Charles Roscarrock (senior) owned Pentire around 1626 and left it to his children in his will including a valuable rabbit warren of 100 acres along the dramatic Pentire cliffs.
Charles Roscarrock (junior) inherited the land in 1636 but had to pay fines for being a Royalist in the English Civil War and he died without surviving male heirs in 1665, leaving Pentire to his daughters.
Arabella Roscarrock, likely the eldest daughter, received Pentire as her portion. It's unclear if she remained unmarried, but eventually, Pentire passed to her sister Elizabeth. Elizabeth married John Hunt in 1672 and left Pentire to him when she died. He then sold Pentire to Thomas Hearle, whose family held it for generations.
In the 19th century, Pentire belonged to John Tremayne, a descendant of the Hearle family. With land holdings all over Cornwall Pentire would have just been a small portion of the family holdings. The Tremaynes are remembered now as being the family who owned the Lost Gardens of Heligan.
Lord Robartes owned Pentireglaze around 1875 and made all sorts of plans to develop housing and pleasure gardens on the Pentireglaze Estate on Tinners Hill. These plans were ambitious and never fully realised but the basis of them became the New Polzeath of today.
In 1936 a speculator offered building plots for sale on Pentire farmland. Local opposition headed by New Polzeath residents raised the funds to purchase all of it and then donated it to the National Trust.
Some Information here based on: Parochial History of the Parish of St. Menefreda (alias St. Mikfre, alias St. Minver), County of Cornwall
Author: Sir John Maclean, F.S.A. (Fellow of the Society of Antiquaries)
Published: 1876, printed by William Pollard, North Street, Exeter
My favourite map of all! From Newhall Manor estate documents showing the Pentireglaze Haven field names and yields and also the lode lines.
I thought I may have shown it here before but maybe not.
If you are able to comment on it PLEASE DO
Most of the lands Newhall Manor owned were in St Kew parish, but the centre from which it was named is in St Teath.
Details of rents and duties due from the free and conventionary tenants for the year ending Michaelmas 1807 were:
Reeve: Not stated.
High rents/free tenants:
George Martyn: Dallamere and Helland.
Robert Bake: Hendra.
Richard Watt: Hendra farthing land.
Conventionary rents/tenants:
John Brocon: Under Vicarage.
Robert Bake, Susanna Watts: Lanagan.
Brown and Libbey: Newhall Mill.
Thomas Thomas: One quarter of Trewigger.
John Martyn: Newhall.
Jonathan Riggs: Trecreeg.
Jonathan Woolcock: Hoopers Tenement.
Benjamin Hawkins: Trevornon.
James Wilton: Amble.
Richardson Gray: Treswarrow.
John Thomas: Higher Trethawks.
William Sandy's: Lower Trethawks.
Jonathan Riggs: Trecreege.
Joseph Gard: In Farrabury.
Henry Hoskins Executors: Hender and Coplestone.
Phillip Symons: In Botreaux Castle.
Samuel Worden: In Chapel Amble.
Samuel Worden: Porrels.
Samuel Billington: Greater [Ho...] in Port Isaac.
Richard Martyn: On half of Paradice.
Total: £50 9 shillings 1 penny.
John Hearle Tremayne (17 March 1780 – 27 August 1851) was a member of a landed family in the cornish county of Cornwall, and owner of the Heligan estate near Mevagissey. He was a member of the UK Parliament for the constituency of Cornwall, a Justice of the peace, and High Sheriff of Cornwall in 1831. He was also the second of four successive members of the Tremayne family who are credited with the creation of the gardens around Heligan House that are now well known as the Lost Gardens of Heligan.
On his father’s death in 1829 he inherited his landed property in Cornwall and Devon and was the residuary legatee of the personal estate, which was sworn under £35,000. As sheriff of Cornwall he convened county meetings on the Grey ministry’s reform bill, 23 Mar., 26 Oct. 1831, and after the latter he expressed the hope that the issue might ‘be so settled as to secure the permanence of the constitution and the happiness of the country’. He declined an invitation from leading Conservatives to stand for East Cornwall at the general election of 1832. He ‘dropped down suddenly and expired at the railway station at Dawlish’ in August 1851, leaving his estates to his eldest son, John Tremayne (1825-1901)