[4] In September 1597 John Keith of Subster attacked the tower in the dead of night, climbing the walls with ladders, taking its occupants by surprise and capturing the place.

In 1651, Oliver Cromwell may have used Ackergill Tower to garrison his troops during his siege of the Keith's Dunnottar Castle, when he was hunting for the Honours of Scotland.

In the mid-19th century, further additions including a cap-house were made by the architect David Bryce on behalf of George Sutherland Dunbar, 7th Lord Duffus.

[1] In 1963, Maureen Blake, who as a girl lived with her mother and C. S. Lewis for about twenty years, became the eighth baronetess of Hempriggs and the steward of Ackergill Tower until it was sold in 1986.

The tower was later sold and the new owners, AmaZing Venues, part of Clarenco LLP, acquired a five-star rating in 2012 having spent £2 million upgrading facilities.