Upward we climbed until at last we came to the opening. There we paused and looked about. Where was Del Mar? Where was Elaine? We could see no trace of them.
Finally, however, Arnold discovered the trail in the grass and we followed him, slowly picking up the tracks.
. . . . . . .
Knowing that the submarine would cruise about and wait for him, Del Mar decided to leave Elaine in the hut while he went out and searched for a boat in which to look for the submarine.
Coming out of the hut, he gazed about and moved off cautiously. Stealthily he went down to the shore and there looked up and down intently.
A short distance away from him was a pier in the process of construction. Men were unloading spiles from a cable car that ran out on the pier on a little construction railway, as well as other material with which to fill in the pier. At the end of the dock lay a power-boat, moored, evidently belonging to some one interested in the work on the pier.
The workmen had just finished unloading a car full and were climbing back on the empty car, which looked as if it had once been a trolley. As Del Mar looked over the scene of activity, he caught sight of the powerboat.
"Just what I want," he muttered to himself. "I must get Elaine. I can get away in that."
The workmen signalled to the engineer above and the car ran up the wharf and up an incline at the shore-end.
The moment the car disappeared, Del Mar hurried away in the direction he had come.