had reached its utmost limits; secondly, an account of its roads and
communications by land; and, lastly, an abstract of the principal imports
into it, and the laws and finances, so far as they respect its commerce.

1. The empire, at the death of Augustus, was bounded on the west by the
Atlantic ocean, on the north by the Rhine and the Danube, on the east by
the Euphrates, and on the south by the deserts of Arabia and Africa. The
only addition which it received during the first century was the province
of Britain: with this addition it remained till the reign of Trajan. That
emperor conquered Dacea, and added it to the empire: he also achieved
several conquests in the east; but these were resigned by his successor
Adrian. At this period, therefore, the Roman empire may be considered as
having attained its utmost limits. It is impossible to ascertain the number
of people that were contained within these limits. In the time of Claudius
the Roman citizens were numbered; they amounted to 6,945,000: if to these
be added the usual proportion of women and children, the number will be
encreased to about 20,000,000. If, therefore, we calculate, as we may
fairly do, that there were twice as many provincials as there were citizens
with their wives and children, and that the slaves were at least equal in
number to the provincials, the total population of the Roman empire will
amount to 120,000,000.

Our ideas of the vastness and wealth of the empire will be still farther
encreased, if we regard the cities which it contained, though it is
impossible to decide in most instances the extent and population of many
places which were honoured with the appellation of cities. Ancient Italy is
said to have contained 1197, Gaul 1200, of which many, such as Marseilles,
Narbonne, Lyons, &c. were large and flourishing; Spain 300, Africa 300, and
Asia Proper 500, of which many were very populous.

2. All these cities were connected with one another and with Rome itself by
means of the public highways: these issuing from the forum, traversed
Italy, pervaded the provinces, and were terminated only by the frontiers of
the empire. The great chain of communication formed by means of them from
the extreme north-west limit of the empire, through Rome to the south-east
limit, was in length nearly 4000 miles. These roads were formed in the most
substantial manner, and with astonishing labour and expence; they were
raised so as to command a prospect of th