We could see about half a mile in either direction, but there was no sign of our companions, and my heart sank again.  There were, however, here and there, ridges of rock, running down like breakwaters into the sea, and about which it fretted and tossed tremendously; and, in the hope that one of these ridges might hide our friends from our view, I climbed to the top of the highest piece of rock I could reach, and took a long and careful survey.