Dave was thinking of turning about when the sub came to a stop with a suddenness which threatened to pitch the party into the sea.
"What now?" demanded the Doctor.
Ordering the power shut off, then flashing a light before them, Dave exclaimed: "A beach, a sandy beach!" Then, with the enthusiasm of a boy, he sprang forward, leaping into shallow water and wading ashore.
Once ashore he flashed his light about in the icy caverns which left but a narrow sandy beach. Then, with a cry of horror, he sprang backward. Before him towered an immense hairy monster, with tusks three times the length of a man's arm.
The instant the cry had left his lips, he knew the laugh was on him. But the cry had gone forth, echoing through the corridors. It brought the jackies and the Doctor splashing through the water to his rescue.
"Only a frozen mastodon," he grinned sheepishly, as they came to his side. "Guess he's been dead ten thousand years, to say the least. But honest, doesn't he look natural standing there in the ice?"
He flashed the light suddenly upon the ice-encased monster, and the jackies jumped, as if they, too, expected to be attacked.
"A beautiful corpse, I'd say," exclaimed one of them.
"A most remarkable specimen," commented the Doctor. "I've heard of cases like this, but never saw one before."
"Say!" exclaimed Jones. "If we could only get him out of here like that and put him down in alcohol, we'd have a side-show that would make Barnum jump out of his grave!"