The people of Antwerp, after learning the success of their mine-ship, now did homage to the inventor with as much extravagance as they had a short time before mistrusted him, and they encouraged his genius to new attempts. Gianibelli now actually obtained the number of flat-bottomed vessels which he had at first demanded in vain, and these he equipped in such a manner that they struck with irresistible force on the bridge, and a second time also burst and separated it. But this time, the wind was contrary to the Zealand fleet, so that they could not put out, and thus the prince obtained once more the necessary respite to repair the damage. The Archimedes of Antwerp was not deterred by any of these disappointments. Anew he fitted out two large vessels which were armed with iron hooks and similar instruments in order to tear asunder the bridge. But when the moment came for these vessels to get under weigh no one was found ready to embark in them. The engineer was therefore obliged to think of a plan for giving to these machines such a self- impulse that, without being guided by a steersman, they would keep the middle of the stream, and not, like the former ones, be driven on the bank by the wind. One of his workmen, a German, here hit upon a strange invention, if Strada's description of it is to be credited. He affixed a sail under the vessel, which was to be acted upon by the water, just as an ordinary sail is by the wind, and could thus impel the ship with the whole force of the current. The result proved the correctness of his calculation; for this vessel, with the position of its sails reversed, not only kept the centre of the stream, but also ran against the bridge with such impetuosity that the enemy had not time to open it and was actually burst asunder. But all these results were of no service to the town, because the attempts were made at random and were supported by no adequate force. A new fire-ship, equipped like the former, which had succeeded so well, and which Gianibelli had filled with four thousand pounds of the finest powder was not even used; for a new mode of attempting their deliverance had now occurred to the people of Antwerp.