My oldest is Angus MacGregor of Latheron, Caithness who as a 105-yr-old was featured in an article in the John O'Groats Journal in 1840 - this article was also picked up by the Times, 20 May 1840. Angus was still alive for Scotland's 1841 census as a 106-year-old. I haven't found his death/burial, so don't know how much longer he lived.
He was apparently discharged from the Army in 1785 aged 50 but had again "buckled on his armour during the French war". By 1840 he was "rather oblivious of matters of recent occurrence", but his reminiscences of days of yesteryear were said to be quite vivid.
Anna