“By gracious, it’s a house!” cried Jack; “that’s what it is!”

“A castle, rather.”

“You are right!”

“Strange! It seems to be a very ancient affair.”

“Ancient or mediaeval; half in ruins, too.”

They walked on around the strange old stone structure, scarcely daring to enter the dark doorway, for neither of them had the least desire for further adventures, particularly if they were going to delay their journey to Suez.

When they got around on the other side, they discovered that they were on an island, and a very small one at that.

The sea was all around them; as for the fog, it was apparently beginning to break.

“There won’t be much of it left in half an hour, if I know anything,” remarked Jack. “I’ll give the captain the whistle again to let him know that we are all right.”

“I wouldn’t,” said Harry.