Hastily gathering a force of some ten companies from the garrison of Utrecht, some of which very troops had recently and unluckily for government, been removed from Brill to that city, the Count crossed the Sluis to the island of Voorn upon Easter day, and sent a summons to the rebel force to surrender Brill. The patriots being very few in number, were at first afraid to venture outside the gates to attack the much superior force of their invaders. A carpenter, however, who belonged to the city, but had long been a partisan of Orange, dashed into the water with his axe in his hand, and swimming to the Niewland sluice, hacked it open with a few vigorous strokes. The sea poured in at once, making the approach to the city upon the north side impossible: Bossu then led his Spaniards along the Niewland dyke to the southern gate, where they were received with a warm discharge of artillery, which completely staggered them. Meantime Treslong and Robol had, in the most daring manner, rowed out to the ships which had brought the enemy to the island, cut some adrift, and set others on fire. The Spaniards at the southern gate caught sight of their blazing vessels, saw the sea rapidly rising over the dyke, became panic-struck at being thus enclosed between fire and water, and dashed off in precipitate retreat along the slippery causeway and through the slimy and turbid waters, which were fast threatening to overwhelm them. Many were drowned or smothered in their flight, but the greater portion of the force effected their escape in the vessels which still remained within reach. This danger averted, Admiral de la Marck summoned all the inhabitants, a large number of whom had returned to the town after the capture had been fairly established, and required them, as well as all the population of the island, to take an oath of allegiance to the Prince of Orange as stadholder for his Majesty.