During the long siege of Edinburgh Castle both sides engaged in underground warfare — the besiegers attempting to mine under the castle walls and the garrison counter-mining to collapse the attackers' tunnels. The mining operations on the approach to the Half Moon Battery were among the most technically ambitious of the siege. The counter-mine successfully broke into the besiegers' tunnel and drove them out, delaying the final assault for months.
Aubrey generates in-depth historical research for any location in Britain — drawing on Domesday records, scheduled monuments, Victorian OS maps, geological data and archaeological archives to tell the full story of a place.
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