A low buzz of satisfaction arose; and Nic hurried out, to walk in the direction of the signal-staff, where the Captain had gone to look out for their allies.

“Who goes there?” came in the old officer’s deep voice.

“Only I, father.”

“Bah!” cried the Captain in a low, angry voice. “Give the word, sir—‘Tails.’”

“The word?—‘Tails!’” said Nic, wonderingly.

“Of course. I told you we must have a password, to tell friends from foes.”

“Not a word, father.”

“What, sir? Humph, no! I remember—I meant to give it to all at once. The word is ‘Tails’ and the countersign is ‘Heads,’ and any one who cannot give it is to have heads. Do you see?”

“Oh yes, father, I see; but are the sailors coming?”