G. Bradshaw's map of canals, navigable rivers, rail roads &c., in the midland counties of England : from actual survey shewing the heights of the ponds on the lines of navigation from a level of 6ft.10in. under the Old Dock Sill at Liverpool /
Bradshaw, George,1801-1853.
Twyford & Wilson.
Manchester : G. Bradshaw,
12th February, 1829.
Pasted down part of title"from a level of 6ft.10in. under the Old Dock Sill at" suggests there was an earlier version of the map.
Pasted down dedication: "To Thomas Telford F.R.S. L.& E. president of the Institution of Civil Engineers this map as a tribute of respect is by permission dedicated by his obliged G. Bradshaw".