This terrible wind now came on, blowing furiously from the east. The rudder--that is, the machine by which a ship is guided on its course--was useless in such a storm, and the vessel became quite unmanageable. St. Luke says, "And when the ship was caught, and could not bear up into the wind, we let her drive." The ship, thus left to the mercy of the wind, was driven straight to an island, called Clauda. We read, "And running under a certain island which is called Clauda, we had much work to come by the boat: which when they had taken up, they used helps, undergirding the ship." Most ships have a small boat, which is usually drawn after them by a rope fastened to the stern, or hind part, of the vessel; but, fearing that the violence of the wind and waves would wash the boat quite away, the sailors, though with great difficulty, managed to draw it up on the ship's deck, ready for use in case of need. "Undergirding," was passing strong ropes under the ship, and bringing the ends from each side upon deck, where they were fastened together; so as to support and hold in their places, all the planks and timbers of which the ship was built. Sheltered a little from the storm under the north side of the island of Clauda, the seamen were able to accomplish this work, after which they could do no more. Chapter XXIX.--THE SHIP RUNS AGROUND. St. Luke having mentioned the undergirding of the ship, adds, "and, fearing lest they should fall into the quicksands, strake sail, and so were driven."