'Two-faced Janus.' Janus was an old Latin deity, god of the morning and of gateways.

He was represented as 'two-faced,' looking before and behind.

There was a double archway in the forum, called _Janus_, which was closed in times of peace, but opened in time of war.

See stanzas lxxxi., lxxxii.
XXVIII.

The Auruncans were a tribe living in Campania.
XLI.