re: "The Adair's new castle at Stranraer was probably designed to further extend the laws and authority of the Scottish Crown over an area that had justly earned a reputation for difficulty and lawlessness. Doubtless the Adairs were charged with controlling not only the local domiciled population but also the transient folk from Ireland who played big part in the socitey and economy of the region. As the castle became the focus of administrative life in the later 1500's, Stranraer grew into a sizeable burgh, for exceeding in size its local rival of Portpatrick. In the 1590's the castle passed from the Adair family to the Chappel branch of the Kennedys, another significant family in the history of south west Scotland."
Helen Adair, (dau of Ninian Adair of Kinhilt and of Stranraer Castle), mc.1603 Gilbert Kennedy of Aryewlane / Airiealan, Glenluce, and in 1627 he dispones Uchterlure to Sir John McDowell of Garthland. (Wigtownshire Charters, Third Series, Vol. 51, Edited by R.C. Reid, LL.D. Printed 1960 for the Scottish History Society (Snippets on a search of Google books) chart on p.103.
Gilbert Kennedy purchased the Adair's Drummore Castle in Kirkmaiden.
Gilbert Kennedy's brother, Hugh Kennedy of Chapell m. Florence McDowell.
Perhaps the Stranraer Castle may have passed to Helen Adair, dau of Ninian ?