They made their way to the cave-mouth, cautiously. Still there was no sign of the captain.
"Better call him," suggested Frank.
They halted.
"Captain Royal!" shouted Joe.
There was no answer.
"I guess he's not at home."
They called out Captain Royal's name again, but still there was no reply, so they ventured close to the cave-mouth and peeped inside. The place was deserted.
"Shall we go in?" said Joe.
"Sure. We'll take a look around."
They stepped inside the cave. Captain Royal had evidently spent the night there, for his bed was even untidier than it had been the previous day.