"Susanna Fisher's researched history tells the story of the families and companies that dominated this trade from the 1750's until the present day. The makers of the blueback charts were amongst the great cartographers of their day and names like Sayer, Laurie and Findlay are well known to anyone who has an interest in old sea charts. The high and low fortunes of their businesses and the London world in which they lived and work is colourfully portrayed."--Jacket.