lumbering steps.

All of a sudden the downed fugitive began to fight, and Jack was forced
to be strenuous.

"Here, let me take him. I'll quiet him," promised Jacob Farnum, grimly.
That gentleman was in a state of mental maze over the sight of what at
first appeared to be two Jack Bensons fighting each other; Yet the
incident gave him evidence that there was something unusual in this
night's appearances. Without any difficulty, now, he separated the
real from the false Jack, and promptly laid hands on the latter.

Don Melville's face was now a sickly white, but he felt that he had to
act on the instant.

"Here, let that fellow go," he ordered, darting up, his eyes blazing.

"Get back there! Stand away! Hands off!" roared the submarine boy,
facing young Melville and sending him back by a blow in the chest.

"Let that fellow go!" insisted Don, angrily. "If you try to hold him,
I won't be responsible for what I do!"

"I can tell you what you'll do, if you try to mix in at all where Mr.
Farnum is busy," retorted Jack, facing his foe with a savage grin.

Nevertheless, Don, espying a stick of wood lying on the ground, snatched
it up, then tried to dart around Captain Jack in order to get at Mr.
Farnum, who was having a rather one-sided struggle with the recent
fugitive.