Letting go of his hand-spike, he regained his cabin. "Hercules," then said Dick Sand, "I charge you especially to watch over that man." "I shall watch," simply replied Hercules, clenching his two enormous fists in sign of assent. Mrs.Weldon and Dick Sand then turned their eyes again on the whale-boat, which the four oarsmen bore rapidly away. It was nothing but a speck on the sea. * * * * *.