Captain Austin called Jay and Weddigen together amidships to give them their last instructions. With a stub of a pencil he drew a plan of the wreck as near as he could estimate it from the previous reports of other divers and the ship's owners. "The ribs sticking out of the water yonder are supposed to be forward of the room where the treasure was stored," he told them. "It is reported that the diamonds are in a small iron safe that was kept in the captain's cabin. The bullion was in iron chests also in the captain's cabin." He indicated on the rough map where the strong boxes were supposed to lie. "When the _Dominion_ ran for the shore," he continued, "she was afire aft and amidships. She struck the sand so hard she buried her nose in the soft ground, and those ribs you see were planted so solidly that the surf was never able to beat them down. You ought to find the captain's cabin about twenty paces aft of the ribs." Jay examined the crude sketch long and hard, asking many questions to make as sure of his ground as possible. Weddigen scowled and guessed how he would "jes prowl around until he found it." "Go ahead then, boys, and get in your togs," ordered the captain. With Dick's assistance Jay was soon ready to go over. The suit securely fastened on to make sure there were no leakages anywhere that would let in water, he sprawled on a deck chair while Dick put on the ponderous twenty-pound shoes that were to help anchor him down. Soon the helmet was adjusted on to the breastplate and the thumb screws set. The eye-pieces were hinged like a ship's porthole windows and not closed until the very last minute. As Jay was ready for the finishing touches Dick leaned close and peered into the face of his old chum. "All right, old boy," he comforted. "I'll be right here on this end keeping close watch. If anything happens just give me the emergency quick. And, for the love of Mike, keep your googley-eyes on that bird Weddigen." Jay smiled, an answering "Yes," and motioned for the eye-pieces to be closed. Immediately the air pump was started, feeding its supply of fresh oxygen to the imprisoned diver. With a man on each side of him Jay scuffed across deck and went over the side on a ladder leading down into the water. Just before his helmeted head went under he took one last look around for direction and fixed in his mind the path to be taken in the journey toward the _Dominion_. Down he went. The sun shone into the water, and with the sand for a background the light in the sea was fairly good. "Well, here we are--and now for the _Dominion_," Jay chuckled to himself as his feet hit bottom and he started along, using a small peak-nosed shovel as a push-pole to help himself along. Through his bull's-eyes he could see ahead some distance. Vainly he cast right and left for some trace of Weddigen, but nowhere was his diving companion to be seen.