HISTORY OF THE IL-KHANS
deliberation as in his advance through Central Asia. In March or April
1257
he left the Qazvin area en route for Hamadan and was joined,
apparently before reaching his destination, by Baiju, the successor of
Chormaghun in the West, whom he presumably instructed on the role
of his army in the forthcoming campaign. Hulegii himself, with the
Jochid princes Quli, Balaghai and Tutar, encamped on the Hamadan
plain, from whence, after a brief stay, he set off in the direction of
Baghdad, arriving in Dinavar on
26
April; he then, for some unknown
reason, returned to Hamadan; on 26 July he was in Tabriz and on
21
September back in Hamadan. Here began what Grousset
1
has called
the " dialogue epistolaire" between Hiilegii and the caliph, "un des
plus grandioses de l'histoire". The gist of Hiilegii's
first
message,
shorn of Rashid al-Din's rhetoric, was that the caliph should either
present himself in person or send his three principal officers, the vizier,
the commander-in-chief and the lesser davdt-ddr or vice-chancellor; the
caliph's reply was to the
effect
that this raw and inexperienced young
man should return whence he had come. There followed a second
exchange in similar tone, after which, wishing to secure his passage
through the
Zagros
mountains, Hiilegii established contact with the
caliph's governor of Dartang and persuaded him to hand over the
castles in his area: though the governor afterwards repented of his
treason, the castles were retained through the intervention of Ket-Buqa
at the head of 30,000 horse. The way being thus cleared, the Il-Khan
consulted his leading men as to the advisability of an attack on Baghdad.
The astronomer Husam al-Din, who, despite his Muslim name, had
been attached to Hiilegii by the order of the Great Khan, spoke openly
against such a move. Every ruler who had attacked Baghdad and the
'Abbasids had forfeited his kingdom and his life; and he foretold six
natural disasters that would occur if Hiilegii made the attempt. Hulegii
then turned to Nasir al-Din Tusi, who had now joined his suite, and
asked his opinion. With equal discretion and common sense the philo-
sopher replied that none of these disasters would occur. " What then
will happen ?" asked the Il-Khan. " Hiilegii will reign in place of
Musta'sim", he replied; and in a disputation with Husam al-Din he had
no difficulty in citing a number of cases in which the caliphs had come
to a violent end without any consequent calamity.
The decision being now taken, the Mongol armies converged on
Baghdad. Baiju, coming from the direction of Irbil, crossed the Tigris
1
U Empire des
steppes,
p. 428.
346