E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
which runs from Beachley to Flintshire, was not the work of Offa, King of Mercia, but was repaired by him. It existed when the Romans were in England, for five Roman roads cross it. Offa availed himself of it as a line of demarcation that was sufficiently serviceable, though by no means tallying with his territory either in extent or position.