A castle has to be able to withstand both direct assault and siege. While Mingary looks formidable, it had sufficient weaknesses to be successfully attacked by the Royalist Alasdair MacColla MacDonald in 1644 who, as described in the earlier post, here, managed to subdue the garrison surprisingly quickly by assaulting, and burning down the gate. But the account makes it clear that the defenders were already in trouble: "....the continual thundering of muskate and cannon did so shake the rock as thair wall [well] went dry...."
Further evidence for the weakness of the water supply also comes from an account of the subsequent siege of the Royalist forces which then held Mingary. The Coventanting general, David Leslie, invested the castle for seven weeks. An account from the time described how the only water available was from rainwater which gathered in the wall-head.
Ashley Thompson, shows the rocks that form the causeway sitting on the rubble infill of the moat.
Many thanks to John-Paul Ashley for the photograph,
and to Flying Scotscam for the aerial picture of the castle.