Then he laid siege to Negropont, the chief city of the old isle of Eubœa; but the plague broke out in his camp, and weakened his troops so much that they were defeated and forced to give up the attempt.  Illness, too, hindered him from taking Malvasia; his health was broken, and he died soon after his return to Venice.  Four great and bloody sea-fights took place during the next few years, and in one the Turks had the victory, in the others it was doubtful; but when peace was made, in the year 1699, the Morea was yielded to the Venetians, and they put a line of forts across the Isthmus to secure it, as in old times.  But the Venetian Republic had lost a great deal of strength and spirit, and when, in a few years, the Sultan began to prepare to take back what he had lost, the Doge and Senate paid little attention to his doings; so that, when 100,000 Turks, with the Grand Vizier, sailed against the Morea, besides a fleet of 100 ships, the Venetian commander there had only 8000 men and 19 ships.  The Venetians were hopeless, and yielded Corinth after only four days’ siege; and though safety had been promised to the inhabitants, they were cruelly massacred, and the same happened in place after place till the whole Morea was conquered, and the Venetians took ship and left the unhappy Greeks to their fate, which was worse than ever, since they were now treated as rebels.