The depth at that point was not great, scarcely more than sixty feet. The pressure of the water overhead made walking rather difficult, and the boys were strange to the lines they were drawing after them, but they made good progress until they came to the end of the air-hose.
It was not as dark under the waves as might have been expected. The light of the sun penetrates, ordinarily, to a depth of not far from forty feet, and the moon's rays on this night were very strong. It was not light enough for the boys to see objects around them, but there was a soft illumination above their heads not dissimilar to the faint haze of light which lies over a country landscape situated at no great distance from a city bright with electricity.
By using the searchlights, however, the boys were able to distinguish objects directly about them. They were on a level plain of pure white sand. Ages and ages ago this pavement laid so smoothly on the ocean floor had existed in the form of rocks.
Through countless years it had faced the assaults of the waves, until at last, in utter defeat, it had succumbed to the mighty force and dropped in fine grains to the lower levels of the world. It seemed to Ned that it had lain there for centuries, with never a storm to pile it into ridges or break its level surface into pits.
The scene about the boys was indescribably beautiful. The inhabitants of the sea rivaled the rainbow in brilliancy of coloring. There were more forms of life in sight than either of the boys had ever imagined in existence.
Queer-shaped sea creatures with long tails darted about the rubber-clad figures, and now and then an inquisitive fish with curious eyes poked its nose against the eye plates, as if intent on discovering what sort of creature it was that carried a sunrise in its head.
There were monster creatures in sight, too, and Jimmie jabbed at one of them and brought blood. This brought others, and in a short time the boys found themselves surrounded by a school of sharks.
Ned threw himself down on the sandy bottom and motioned to Jimmie to do likewise. This seemed to surprise the sharks, for they nosed around for only a moment longer. Seeing no opportunity of getting under their prospective dinners, they switched their tails angrily, like a cat in a temper, and swam off about their business, if they had any.
But Ned had little interest in the sea life about him. At another time, and under other conditions, he would have enjoyed the novelty of the scene to the fullest, but now he was anxiously watching for some indication of the presence of the wreck of the Cutaria.
He was as certain as it was possible to be that the Sea Lion had descended almost at the exact spot where the ill-fated vessel went down. The hull should be out there in the sand somewhere, and he lost no time in making his investigations.