"The Third Anglo-burmese War 1885" Paddle steamer HMS Yunan of the Irrawaddy Flotilla leaving Thayetmyo (Fort Cornwallis) towing flat "Wild Swan" armed with six 9 inch howitzers. These were manned by the Royal Artillery, the gun crews being protected by boiler plate. The Gun Flat was the Irrawady Flotilla Company's Oil Flat AP Min, built in 1883 and sunk in 1911.