The skirmish known as Cleanse the Causeway, or Clear the Causeway, took place in the High Street of Edinburgh, Scotland, on April 30, 1520, between rivals James Hamilton, 1st Earl of Arran, chief of Clan Hamilton, and Archibald Douglas, 6th Earl of Angus, chief of Clan Douglas. The fight went badly for the Hamiltons, and Sir Patrick Hamilton and about 70 others were killed in the incident. The Earl of Arran and Sir James fought their way out, and escaped along a narrow close. Stealing a nearby pack-horse they fled through the shallows of the Nor Loch marshes.