Camp of Rhé Dykes, 1785. [Map of Rhé Dykes and the surrounding country, showing the line of the Roman advance to the camp / 
Cary, John, Geographer.
[London :  J. Stockdale, 
1806]
In: Britannia ... By W. Camden. Translated ... by R. Gough. Second edition. Vol. 4. p. 151.