Inverallochy Castle lies .5 miles south of what z-plan castle that was described as one of the nine castles of the Knuckle?
Inverallochy Castle:  It lies 0.5 mi south of Cairnbulg Castle near Fraserburgh. Cairnbulg Castle: Cairnbulg Castle is a z-plan castle situated in Cairnbulg, Aberdeenshire, Scotland. Cairnbulg Castle:  It was described by W. Douglas Simpson as one of the nine castles of the Knuckle, referring to the rocky headland of north-east Aberdeenshire.
Cairnbulg Castle