Printed map. Visual scale [205 mm = 8 miles]. "To the most noble Robert Bertie Duke of Ancaster and Kesteven, Marquis and Earl of Lindsey, Baron Willoughby of Eresby. Hereditary Lord Great Chamberlain of England; Lord Lieutenant and Custos Rotulorum of the County OF Lincolnshire. This map, is humbly inscribed by his Graces most obedient and most humble servant, A. Armstrong." Includes 2 insets: "Plan of Boston." and "Plan of Spalding."