But Treslong disobeyed the orders, and remained week after week at Ostend drinking heavily and doing nothing else. At last the States, enraged at his disobedience, ordered him to be arrested and thrown into prison; but this was too late to enable the needed stores to be taken up to Antwerp. The citizens were under no uneasiness. They believed that it was absolutely impossible to block the river, and that, therefore, they could at all times receive supplies from the coast. On both sides of the river below the town the land was low and could at any time be laid under water, and Sainte Aldegonde brought the Prince of Orange's instructions that the great dyke, called Blauwgaren, was to be pierced. This would have laid the country under water for miles, and even the blocking of the river would not have prevented the arrival of ships with provisions and supplies.

Unfortunately Sainte Aldegonde's power was limited. The Butchers' Guild rose against the proposal, and their leaders appeared before the magistrates and protested against the step being carried out. Twelve thousand cattle grazed upon the pastures which would be submerged, and the destruction of farms, homesteads, and orchards would be terrible. As to the blocking up of the river, the idea was absurd, and the operation far beyond the power of man. The butchers were supported by the officers of the militia, who declared that were the authorities to attempt the destruction of the dyke the municipal soldiery would oppose it by force.