Regarding the Buchanan Estate (c1681), according to William Buchanan of Auchmar, "The most flourishing condition it has been in, for diverse ages, was upon the last laird's accession to it" (c1652) (by 'the last laird,' he was referring to John Buchanan, son of Sir George Buchanan.) At this time the estate included the Barony of Buchanan, "several lands in the parishes of Killearn, Strathblane, and others in Lennox" (Strablane is likely to be Strathblane which is between the parishes of Killearn and Lennox); "the whole estate of Badindalloch" (in Stirlingshire); and "the estate of Craigmillar in Midlothian". Along with the inheritance of the estate and clan chiefship, there was significant debt. John Buchanan was unwilling to receive his inheritance until his brother-in-law to be, David Erskine, 2nd Lord Cardross, arranged for creditors to accept as payment only a portion of what was owed (a composition). Debt continued to plague John Buchanan, and in about 1680, he and his named successor, Major George Grant (alias Major George Buchanan of that Ilk), sold some of the Highland lands to James Grahame, the Third Marquess of Montrose. It appears that there were other claimants to the Highland lands and as a guarantee that the sale would proceed, John Buchanan offered the Barony of Buchanan as security (an infeftment of real warrandice). It transpired that the sale did not proceed and the Marquess of Montrose became the owner of the Barony of Buchanan and it became the seat of Clan Graham. Prior to the sale, John Buchanan of Arnpryor had been the estate manager for John Buchanan. After the sale, John Buchanan of Arnpryor received a quarter of the estate from the Marquess of Montrose for his services and assistance in evicting the whole estate. (Precisely what his services were and the meaning of "evicting the whole estate" is unclear.)