Damn, I thought. The light's running out, and we have to make this place work. He climbed aboard, brought the anchor up with the windlass, and we tried again. After the anchor and about 50 feet of chain were down again, Douglas jumped back in, dived down, and looked around for better ground. There wasn't any, but he found a natural hole in the concrete-like bottom, lugged the anchor over to it, set the point in the hole, surfaced and signaled. I went forward, let out more chain, wrapped it around the forward cleat, went back to the cockpit, and slipped Ithaka into a slow reverse. Douglas watched the chain pull gently against the anchor below. It seemed secure in its hole. He surfaced and signaled again, I went forward, let out more chain, recleated it, went back to the cockpit, backed down slowly, felt it strain, and put it in neutral. Douglas swam back, climbed aboard, we put on the snubber, and then backed her down hard. We didn't budge. He dove it again, watched, and was satisfied, and exhausted. You can't be too careful when you're dealing with a hard coral bottom, and we'd done all we could. We knew the set was less than ideal, but in this case would have to do.