Naturally much delving among records of the past has gone to the making of this book. To enumerate all the sources of information which have been laid under contribution would be a tedious task and need not be attempted, but it would be ungrateful to omit thankful acknowledgment to Henry B. Wheatley's exhaustive edition of Peter Cunningham's "Handbook of London," and to Warwick Wroth's admirable volume on "The London Pleasure Gardens of the Eighteenth Century." Many of the illustrations have been specially photographed from rare engravings in the Print Boom of the British Museum.