General Percy Kirke (c. 1647-91) is remembered in Somerset as a cruel, vicious thug who deluged the region in blood after the Battle of Sedgemoor in 1685. He is equally notorious in Northern Ireland. Appointed to command the expedition to raise the Siege of Londonderry in 1689, his assumed treachery nearly resulted in the city's fall and he was made to look ridiculous when the blockade was eventually lifted by a few sailors in a rowing boat. Yet...