or rather mole, of fifty cubits in breadth, and one hundred in length: it was formed of casks and hogsheads; joined with rafters, linked with iron, and covered with a solid floor. On this floating battery he planted one of his largest cannon, while the fourscore galleys, with troops and scaling ladders, approached the most accessible side, which had formerly been stormed by the Latin conquerors. The indolence of the Christians has been accused for not destroying these unfinished works; [511] but their fire, by a superior fire, was controlled and silenced; nor were they wanting in a nocturnal attempt to burn the vessels as well as the bridge of the sultan. His vigilance prevented their approach; their foremost galiots were sunk or taken; forty youths, the bravest of Italy and Greece, were inhumanly massacred at his command; nor could the emperor's grief be assuaged by the just though cruel retaliation, of exposing from the walls the heads of two hundred and sixty Mussulman captives. After a siege of forty days, the fate of Constantinople could no longer be averted. The diminutive garrison was exhausted by a double attack: the fortifications, which had stood for ages against hostile violence, were dismantled on all sides by the Ottoman cannon: many breaches were opened; and near the gate of St. Romanus, four towers had been levelled with the ground. For the payment of his feeble and mutinous troops, Constantine was compelled to despoil the churches with the promise of a fourfold restitution; and his sacrilege offered a new reproach to the enemies of the union. A spirit of discord impaired the remnant of the Christian strength; the Genoese and Venetian auxiliaries asserted the preeminence of their respective service; and Justiniani and the great duke, whose ambition was not extinguished by the common danger, accused each other of treachery and cowardice.