E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
Watling Street.
A road extending east and west across South Britain. Beginning at Dover, it ran through Canterbury to London, and thence to Cardigan. The word is a corruption of Vitellina strata, the paved road of Vitellius, called by the Britons Guetalin. Poetically the Milky Way has been called the Watling Street of the sky.
1
Secunda via principalis dicitur Wateling-streate, tendens ab euro-austro in zephyrum septentrionalem. Incipit a Dovaria usque Cardigan.Leland.