"It is not very pleasant," remarked Jack, "to know that an enemy is plotting against you in a far-off country and sending out men to kill you."

"I have an idea," said Mole.

"Something novel for you, sir."

"Oh! no. This old head has been prolific in its time. Let us form ourselves into the Jack Harkaway guard."

"Splendid idea," cried Harvey. "I volunteer for the service. You and I will arm ourselves and one or both of us will be with him, night and day."

"No, no," said Jack, much touched at this proof of the devotion or his friends, "it is unnecessary."

"On the contrary," answered Mole, "I am sure that this attempt will be followed by others."

"Well! If you insist upon it—"

"We do," said both the professor and Harvey in chorus.

Jack shook their hands in token of gratitude, and as Mr. Mole had brought out a small arsenal of pistols and knives in his trunk, for use in an emergency, he promptly armed both himself and Harvey.