pretorian camp, which was a permanent and fortified station. It stood to
the east of the Viminal and Quirinal hills, between the present Porta Pia
and S. Lorenzo, where there is a quadrangular projection in the city
walls marking the site. The remains of the Amphitheatrum Castrense stand
between the Porta Maggiore and S. Giovanni, formerly without the ancient
walls, but now included in the line. It is all of brick, even the
Corinthian pillars, and seems to have been but a rude structure, suited
to the purpose for which it was built, the amusement of the soldiers, and
gymnastic exercises. For this purpose they were used to construct
temporary amphitheatres near the stations in the distant provinces, which
were not built of stone or brick, but hollow circular spots dug in the
ground, round which the spectators sat on the declivity, on ranges of
seats cut in the sod. Many vestiges of this kind have been traced in
Britain.

[422] The Isthmus of Corinth; an enterprize which had formerly been
attempted by Demetrius, and which was also projected by Julius Caesar,
c. xliv., and Nero, c. xix.; but they all failed of accomplishing it.

[423] On the authority of Dio Cassius and the Salmatian manuscript, this
verse from Homer is substituted for the common reading, which is,

Eis gaian Danaon perao se.
Into the land of Greece I will transport thee.

[424] Alluding, in the case of Romulus, to the rape of the Sabines; and
in that of Augustus to his having taken Livia from her husband.--
AUGUSTUS, c. lxii.

[425] Selene was the daughter of Mark Antony by Cleopatra.