The first Devonian Trevan to return to Cornwall was Matthew Trevan Junr, Yeoman of Eggbuckland, who married Ann Bake of St. Teath in 1782. The Bake family were some time owners of the slate quarry at Delabole, but I have not investigated the Bake name.
By 8 May 1794 his sister Fanny was also living in Cornwall as mentioned in a letter from Ralph Clark to his wife Betsy Alicia nee Trevan. "... to be so good when you wrote in to Cornwall either to Fanny or Mattw. .....". Since in a letter from Ralph to Matthew in the same year he asks Matthew "When you see Fanny Copeland give my kindest wishes to her ..." I presume that she either lived in St. Teath or one of the neighbouring parishes.
And finally Mary Ann Trevan married Moses Male in 1803 at St. Teath.
Matthew Trevan died in 1809 and his headstone is on the outside of the church reads "Sacred to the memory of Mattw Trevan, late of Pengelly in this parish, who left this world in full hope of a blessed Eternity, August the 2d 1809 aged 46". His widow Ann was buried in St. Mabyn.
Port Isaac was part of the parish of St. Endellion until it was made a separate parish in 1913.
John Archer Trevan was a Customs Officer at Port Isaac from 1793 until he retired 50 years later on 18 Nov 1843, age 74. His starting salary as a "Waiter and Searcher" was 5 pounds per quarter after a slow start of being listed with a note "not to be paid" for the first two quarters of the year. In the third quarter (Michaelmas) there is a note "John Archer Trevan to be paid from 1st August incl his admission 3 pounds 13s 2d". His final income in 1843 was 80 pounds and his superannuation was 75 pounds until his death in 1851.
John Archer Trevan married Ann Watts from a long-standing family from Port Isaac in 1797. At his marriage the White House at Port Isaac came into the hands of this branch of the Trevan family. The Watts family included several doctors and the children and grandchildren of John Archer Trevan and Ann nee Watts included 5 doctors, 2 called Matthew, a Henry, a Frederick and a Frederick Adolphus.
He and Ann had a family of 10 children and only one, Isaac, permanently left the area becoming a Customs Officer and living at Looe in south east Cornwall. The remainder of the family are buried in the Trevan burial area in the churchyard at St. Endellion. Inside the church there are 4 plaques to this branch of the family.