The next day the hunt for the sunken treasure began in earnest. CHAPTER XXVIII THE DEMONS OF THE DEEP As early in the day as possible Captain Broadbeam made another astronomical calculation and worked out the position of the _Swallow_ on his set of charts. It was found that the ship lay about one hundred yards to the westward of where the _Happy Hour_ was reported to have gone down. This was not much, but the captain immediately gave orders that the ship be brought to the correct position. "You'll have work enough locating her as it is," said the captain. "More than likely the ocean current has shifted her considerably." Luckily Amos Fearless was now feeling much better, having quite recovered from his experience at the time of the fire on the ship. With the _Raven_ on the scene, it was decided by father and son that the diving bell should be taken directly to the ocean's bottom, if the thing could be accomplished. "I know we are running a risk," said the old diver, in his sign language, "but we must be the first to discover the _Happy Hour_, no matter what the cost. To suffer defeat would kill me." By ten o'clock in the morning the diving bell was over the side and father and son had entered it. Those on the _Raven_ were also getting out a diving bell, and Vixen and Walton were busy overhauling their deep-sea outfits. It was indeed to be a race for the treasure. Soon Dave and his parent had left the outside world behind and were going down and down into the mighty ocean's depths. On this occasion it had been agreed not to look for anything but the sunken treasure ship; consequently, the fish net and several other similar appliances had been left behind. In their places the diving bell contained several tools for digging and hauling and also several under-water firearms, for use against a possible enemy. In addition to the firearms, father and son had provided themselves with long and sharp knives. "There is no telling what we may run across away down there," said Amos Fearless, in his sign language. "We are taking our lives in our hands, to my way of thinking." And what he said was true--as events speedily proved. Soon they passed through the darker portion of the ocean and knew that the first mile of the downward journey had been covered. Then those above lowered more slowly and watched keenly for the first signal that danger might be encountered by those below. "See, it is growing lighter," said Dave, presently, and turned off the electric lights. His father had his hand upon the glass side of the diving bell. "It is also growing warmer," motioned the parent, in his sign language. A mile and a half had been covered and now the waters of the ocean were so clear and light that they could see for a hundred feet about them. The water glistened and sparkled like diamonds as it washed against the sides of the diving bell.