books.google.ca - Stephen D. Mecredy tells the story of Fort Henry, the people and events--hangings, escapes, cholera outbreaks--involved in its colourful past. Fort Henry, with its massive limestone walls and elegant Martello towers, was once central to the defence of Canada; today, its precision drill and battle reenactments...http://books.google.ca/books/about/Fort_Henry.html?id=4yq_LylSrMIC&q=carronade&utm_source=gb-gplus-shareFort Henry