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208 A HISTORY OF THE CRUSADES II 
the doge; and soon afterwards Venice ceded her rights in the Morea, except
for Modon and Coron, to Villehardouin, who gave an annual token tribute to
the Venetians and maintained a house in Venice. <18> 
 Henry then resumed the fight against the remaining Lombard rebels. At Thebes
the Greek population welcomed him warmly, but he had to besiege the castle.
He forced the surrender of the Lombard defenders, and agreed to give Biandrate
a trial before his imperial court. On the way to Thebes, Biandrate escaped
to Euboea. Henry then proceeded to Athens, worshiped in the church of the
Virgin established in the Parthenon, boldly crossed to Euboea despite the
presence of Biandrate, and was preserved from treason by the lord of the
island, Ravano dalle Carceri of Verona, until recently one of Biandrate's
allies. Biandrate himself now submitted. Henry accepted his new oath of homage,
and restored him to office as regent of Thessalonica. It seems probable,
however, that Biandrate returned to Montferrat and continued his efforts
to induce William to claim Thessalonica. The Lombard revolt in Greece was
over. 
 Henry's successes had alarmed Michael of Epirus, who now sent to request
a parley. He agreed to do homage for all his possessions, and married his
daughter to Henry's (probably illegitimate) younger brother Eustace. But
during the very first year after accepting these arrangements Michael violated
his oath. He seized the newly reinstated rebel, Amédée Pofey,
now constable of the Latin Empire, and one hundred other Latins. He mistreated
all of them and crucified Pofey, his chaplain, and three others. This sudden
treachery led to warfare between Michael and Henry, in which Michael had
the services of some Latin mercenaries, sent across the Adriatic in Venetian
ships. By January 1212, Henry commented in a letter, Michael had four separate
times broken his oath not to take up arms against him, <19> but we
do not know the details of their relationships. In 1210 a Venice formally
ceded to Michael the Epirote lands obtained by the partition treaty, but
it is not clear whether this cession took place during one of the periods
of peace between Michael and the Latin empire. In any case, by early 1212
Henry had effectively defeated both Michael and Strez of Prosek. 
 But his other enemies now threatened once again. Defeated by Henry in 1208,
Boril had since occupied himself with a campaign to stamp out Bogomilism
among his subjects; the Bogomils were 
 18 Text in Tafel and Thomas, Urkunden, II, 95 ff. 
 19 Text in RHGF, XVIII, 531.