Harry was too well aware of this to waste much time over the matter.

“If you are resolved to go then I am going too,” he declared.

“That’s all right,” said Jack. “We’ll both go. You’ll find that I am entirely correct; we’ll be back in no time, and then we’ll move the Catamaran beyond the fog belt and go on our way rejoicing.”

“Better tell Clara or Mole or somebody that you are going.”

“No, no! There’s no need of disturbing them! We’ll push right along and have something definite to tell them when we get back.”

So they launched the boat and pulled away.

Jack felt great confidence in the Arab captain, and it was well founded.

There are a few Arabs who are honest, and Jack had found one. The captain was a man to be depended upon in every way.

He instructed Jack to blow a small ivory whistle which he usually carried, every few moments, and he would whistle in return.