Meanwhile the calm continued, but although the regular swell showed some disposition to subside, a heavy cross-swell was rapidly rising, which caused the schooner to plunge and roll in a jerky, irregular manner, and with such violence that at length it became almost impossible to stand without holding on to something, while to attempt to move about became positively dangerous.  To add still further to the unpleasantness of the situation, the little hooker was constantly shipping water so heavily over her rail, bows, and taffrail that we were frequently up to our knees in it, although all the ports had been opened to allow it to run off.