that to the bridge for certain, but both Billingsgate, under another
 name, and Dowgate, at the outfall of the Wallbrook, may have been
 in existence. Two fragments of the old wall may be easily seen.
 One of them, with some strongly marked Roman features, is at the
 new post-office buildings in St. Martin le Grand. The other is the
 well-known bastion in the churchyard of St. Giles s, Cripplegate, which,
 though built of Roman materials, and on a Roman foundation, dates
 probably from an extensive ‘restoration’ of the city walls made in
 the reign of Edward IV.
 
I have endeavoured so far in this chapter to put forward the
 curious tales by which the Londoners of the twelfth century accounted
 for their walls, their gates, and the names they bore. ‘They are more
 entertaining than some of the modern theories with which we meet, but
 they are scarcely more extravagant. Stow put his successors on the
 right track, but they speedily left it. Of these modern theories, only one
 is worth noticing here. Readers of the foregoing part of this chapter
 will have noted that " Roman London,” of which some people talk so
 
glibly, is only, to speak
 strictly, a geographical
 term. There was no
 Roman London, except a
 strongly fortified barrack,
 till after the middle of
 the fourth century, or,
 say, 360. The Romans
 left Britain in 410, their
 ATI influence meanwhile hav¬
 ing steadily declined, the
 country having been con¬
 stantly disturbed by the