Ghost signs - those faded advertisements for long defunct businesses on the walls of old buildings - are among the most potent reminders of a bygone age - and nowhere are they found in greater abundance or variety than on the streets of Bath.Long a source of fascination for visitors and residents alike, signs for forgotten trades such as brushmakers, corn factors and perfumers still jostle for attention alongside modern shopfronts. Canalside coal wharves, a pump room where Jane Austen's brother took the waters, the sinister-sounding Asylum for Teaching Young Females Household Work, and a...