But an invasion was now meditated from a quarter, whence, of all others, it was least expected, and the Christians of the East were attacked by their fellow Christians of the West. The Crusaders were called to arms by a warning which they deemed the voice of God, and they set out from their own homes to obey it. The sufferings they brought upon themselves by their ignorance and presumption, the ruin they inflicted upon others by their vices and passions, could not repress the ardour of these infatuated fanatics. Three times had new swarms set out from Europe, and the miserable remnants returned utterly defeated, after desolating the country of friend and foe through which they passed. The fourth expedition inflicted misery and destruction on the Christian city of Constantinople. After Peter the Hermit and St. Bernard had excited and sent forth a countless rabble to the shores of Palestine, Fulk, another illiterate preacher, issued from his cell at Neuilly, in France, and became an itinerant missionary of the Cross. He commenced, as usual, by performing miracles, and the fame of his sanctity and superhuman power gave him all the influence he could wish in a barbarous and superstitious age; so he excited a fourth crusade against the Infidels, who had, by their presence, desecrated the holy sepulchre. The former soldiers of the Cross had suffered so much by their insane expeditions by land, that they now resolved to undertake one by sea; and for that purpose despatched deputies to the Venetians and the maritime states of Italy, to supply them with a convoy: their request was granted, and a fleet accordingly prepared. Constantinople had hitherto escaped these marauders; they had passed its walls without inflicting injury, but an occasion now occurred which gave them a pretext for entering it. The emperor Alexius had deposed, and put out the eyes of his brother Isaak, whom he kept in prison, and his nephew Alexius, the heir to the throne, was a fugitive in the west of Europe. He thought it a good opportunity to avail himself of foreign assistance, and he applied to the leaders of the crusade to aid his cause. They affected to say, that the recovery of the lime and stone of the holy sepulchre was too important an object to be postponed for one of justice and humanity; but, tempted by large pecuniary offers, and calculating on the pretext of taking possession of the great city, avarice and ambition soon silenced the claims of superstitious piety. Dandolo was then doge of Venice; he was totally blind, yet he embarked with the crusaders. Their immense fleets literally covered the narrow waters of the Adriatic, and they arrived in safety at Chalcedon, under the convoy of the skilful mariners that now conducted them. They mounted to the heights of Scutari, and from thence contemplated, with longing eyes, the wealth and splendour of the magnificent city on the opposite shore, spread out on the seven hills before them.