One ship was christened the Fortune, and on this the mine was to be exploded by a slow match, cut so as to explode at a calculated moment. The mine on board the Hope was to be started by a piece of clockwork, which at the appointed time was to strike fire from a flint. Planks and woodwork were piled on the decks to give to the two vessels the appearance of simple fireships. Thirty-two small craft, saturated with tar and turpentine and filled with inflammable materials, were to be sent down the river in detachments of eight every half hour, to clear away if possible the raft above the bridge and to occupy the attention of the Spaniards. The 5th of April, the day after the capture of the Liefkenshoek, was chosen for the attempt. It began badly. Admiral Jacobzoon, who was in command, instead of sending down the fireboats in batches as arranged, sent them all off one after another, and started the two mine ships immediately afterwards. As soon as their approach was discovered, the Spaniards, who had heard vague rumours that an attack by water was meditated, at once got under arms and mustered upon the bridge and forts. Parma himself, with all his principal officers, superintended the arrangements. As the fleet of small ships approached they burst into flames. The Spaniards silently watched the approaching danger, but soon began to take heart again. Many of the boats grounded on the banks of the river before reaching their destination, others burned out and sank, while the rest drifted against the raft, but were kept from touching it by the long projecting timbers, and burned out without doing any damage. Then came the two ships. The pilots as they neared the bridge escaped in boats, and the current carried them down, one on each side of the raft, towards the solid ends of the bridge. The Fortune came first, but grounded near the shore without touching the bridge. Just as it did so the slow match upon deck burnt out. There was a faint explosion, but no result; and Sir Ronald Yorke, the man who had handed over Zutphen, sprang on board with a party of volunteers, extinguished the fire smoldering on deck, and thrusting their spears down into the hold, endeavoured to ascertain the nature of its contents. Finding it impossible to do so they returned to the bridge.