I have just discovered in a manuscript notebook dated c1905 the following information and transcript of a Cochrane Will which an Alec Purviance witnessed in 1776: After the death of John Coghran in 1778 the house and lands of Edenmore became the sole property of Zacheus Coghran. John’s Will was made 18th November 1776 and proved 16th January 1779 and is as follows: "John Coghran of Edenmore Co. Donegal gentleman, to his brother Zacheus Coghran of Edenmore his interest in Edenmore in Stranorlar Manor in Co. Donegal and to executor £5. To brother William Coghran of Edenmore Co. Donegal £100 and to nephew James son of said William … nephews William and Zacheus and Robert Kinkead and nieces Anne and Francis Kinkead … younger children of Revd. Joseph Kinkead, all nephews and nieces under 21 and unmarried - Witnesses Gust Henderson, Isaac Armstrong, Alec Purviance. Probate to executor".
There is, of course, nothing to indicate that said Alec did not live 100 miles away and was "just visiting"! However, the Scots in Ulster generally stuck together and intermarried. Edenmore is in the Parish of Donaghmore and is about 1 mile to the east of Stranorlar and 6 miles to the west of Castlefinn. John Cochrane's dates are 1720-1778 and Rev. Joseph Kincaid's 1724-1782. What does this tell us of Alec Purviance? Not a lot, but perhaps he was a bit younger than John Cochrane, who was less than two years away from his death when he made his will.
In passing, I notice that everyone in this Forum refers to "Castle Finn". The Ordnance Survey of Ireland has "Castlefinn" on all its maps and, having been born and raised in Ulster, I have never before seen it spelt other than "Castlefinn".