“How interesting!”

It did not strike the Motor Boys so at the time. In fact they thought it was distinctly dangerous, to say the least. But they were so impressed by what Professor Snodgrass said that for years afterward, whenever they were confronted with danger, one or the other was sure to remark—if there was time:

“How interesting!”

“What are they?” whispered Bob, though an instant after he had asked the question he knew. For Tinny had told the boys that mountain lions were the only dangerous animals in the vicinity of Thunder Mountain, and he had fully described the beasts.

“But they won’t hurt you unless you corner them,” Tinny had said. “They’ll slink away and leave you. They’re bad enough in a fight, but they very seldom get into a fight.”

However, this pair seemed very much disposed to fight, and though there was open to them the trail back, along which they could have retreated, the animals seemed disposed not only to stand their ground but to advance.

“I believe they’re actually stalking us!” whispered Ned.

“It does seem so,” admitted Jerry. “And we haven’t so much as a pop gun!”

It was true—they had not come out armed, for the hunting of Professor Snodgrass was merely for bugs, butterflies, and other insects and required no powder or shot.