nce of these important events, which so deeply affected the
honor and safety of the Imperial house, recalled the arms of Constantius
from the inglorious prosecution of the Persian war. He recommended
the care of the East to his lieutenants, and afterwards to his cousin
Gallus, whom he raised from a prison to a throne; and marched towards
Europe, with a mind agitated by the conflict of hope and fear, of grief
and indignation. On his arrival at Heraclea in Thrace, the emperor gave
audience to the ambassadors of Magnentius and Vetranio. The first author
of the conspiracy Marcellinus, who in some measure had bestowed the
purple on his new master, boldly accepted this dangerous commission; and
his three colleagues were selected from the illustrious personages
of the state and army. These deputies were instructed to soothe the
resentment, and to alarm the fears, of Constantius. They were empowered
to offer him the friendship and alliance of the western princes,
to cement their union by a double marriage; of Constantius with the
daughter of Magnentius, and of Magnentius himself with the ambitious
Constantina; and to acknowledge in the treaty the preeminence of rank,
which might justly be claimed by the emperor of the East. Should pride
and mistaken piety urge him to refuse these equitable conditions, the
ambassadors were ordered to expatiate on the inevitable ruin which must
attend his rashness, if he ventured to provoke the sovereigns of the
West to exert their superior strength; and to employ against him
that valor, those abilities, and those legions, to which the house of
Constantine had been indebted for so many triumphs. Such propositions
and such arguments appeared to deserve the most serious attention; the
answer of Constantius was deferred till the next day; and as he had
reflected on the importance of justifying a civil war in the opinion
of the people, he thus addressed his council, who listened with real or
affected credulity: "Last night," said he, "after I retired to rest,
the shade of the great Constantine, embracing the corpse of my murdered
brother, rose before my eyes; his well-known voice awakened me to
revenge, forbade me to despair of the republic, and assured me of the
success and immortal glory which would crown the justice of my arms."
The authority of such a vision, or rather of the prince who alleged
it, silenced every doubt, and excluded all negotiation. The ignominious
terms of peace were rejected with