Sallustius Lucullus, who succeeded Agricola as Pro-praetor, was slain by Domitian only for the invention of an improved lance, known by his name (as rifles now are called Mausers, etc.).
See p. 117.
All highways were made Royal Roads before the end of the 12th century, so that the course of the original four became matter of purely antiquarian interest.
Where it struck that sea is disputed, but Henry of Huntingdon's assertion that it ran straight from London to Chester seems the most probable.