"Nothing in sight," said Dave.
"I see something drifting upon the waves," announced the doctor.
All looked in the direction which he pointed out and saw a large mass of driftwood floating toward them.
"That means a wreck of some sort," cried the captain. "Let us make an investigation."
The others were willing, and not long after this they came up beside the wreckage, which proved to be a spar with cordage and part of a forecastle and rail.
"Can that wreckage be from the Swallow?" asked Dave, anxiously.
"It may be," answered the captain. "Still, I am not sure."
"Perhaps it is from the Raven," came from Doctor Barrell.
"I'd rather it was from that vessel than from our own," said the young diver, quickly. "But it may be from the Swallow, and I'll tell you why," he added, suddenly.
"Well?"