In a screened and secluded corner of one of the many railway-bridges which span the streets of London, there could be seen, a few years ago, from five o'clock every morning until half-past eight, a tidily set out coffee-stall, consisting of a trestle and a board, upon which stood two large tin cans, with a small fire of charcoal burning under each, so as to keep the coffee boiling during the early hours of the morning when the work-people were thronging into the city, on the way to their daily toil.