‘Ding, Clash, Dong, BANG, Boom, Rattle, Clash, BANG, Clink, BANG, Dong, BANG, Clatter, BANG BANG BANG!’ is how Charles Dickens transcribes the sound of 1,200 men building the first iron-clad frigate Achilles at the Royal Dockyard, Chatham, in the 1860s. A Chatham boy, Dickens lived to see — and hear — the age of sail turn into the age of steam, when the creak of ropes, the flap of canvas and the ding of bells gave way to the hiss of steam, the chug of motors and the shriek of whistles.