Map, uncoloured engraving, Inland Navigation of England and Wales, scale
about 23 miles to 1 inch, in The English Counties Delineated by Thomas Moule,
published by George Virtue, 26 Ivy Lane, Paternoster Row, London, 1839.
Rivers, navigable rivers and canals, etc.
scale line:-
60 miles = 66.4 mm
dimension:-
scale = 1 to 1500000 ? (1 to 1454227 from scale line assuming modern mile)