"Oh, then," suggested Reade, "we may as well go along on our way. Plainly
there's nothing human around here to look at but ourselves."

So they started slowly forward over the wall. Leisurely the black man swam
to the wall, taking up the dogged trail again in the darkness behind the
pair of young engineers.

Several minutes more of cautious walking brought Tom Reade to a startled
halt.

"Look there, Harry!" uttered Reade, stopping and throwing the light ahead.

Out beyond them, not far from the end of the wall, some hundred feet of the
top had been torn away. For all the young engineers could see, the
foundations might have gone with the superstructure.

"Dynamite!" Tom muttered grimly. "So this is the way our newly-found
enemies will fight us?"

"It won't be such a big job to repair this gap," muttered Harry calmly.

"No; but it'll take a good many dollars to pay the bills," retorted Tom.

"Well, the expense can't be charged to us, anyway," maintained Harry. "We
didn't do this vandal's work, and we didn't authorize its being done."

"No; but you know why it was done, Harry," Tom continued. "It was because
we drove the gamblers out of the camp, and thus made enemies for ourselves
on both sides of the camp lines."