This was probably the cavern entrance.
He had scarcely noticed it when there sounded the sharp spiteful crack of a rifle behind the vines.
Ping! came a bullet.
It struck Jack squarely over the heart.
His breast plate flattened it and it fell harmless.
"A sentrys shot!" he muttered. "The villains know we are here now and the siege will soon begin."
CHAPTER XIX.
THE BANDIT'S LAST SHOT.
"Timberlake, I think I can run the Terror into that cave."
"Look out you don't get her jammed in the entrance."