On May 27, 2007, flames damaged the 19th Century ship Cutty Sark - the historic tea clipper at its dry ock in William Walk, Greenwich. Forty firefighters, eight pumps and an aerial ladder battled the blaze. Built in 1869, Cutty Sark was the last clipper constructed as a merchant vessel. She went on public display in 1954. Investigators determined the fire was caused by an electrical fault in a vacuum cleaner.