"Am _I_ touched, as you call it, Jack?" demanded Professor Henderson, in
some indignation.

"But you don't believe Todd is on the trail of any great discovery?"
cried Mark.

"Why not? Mind may yield to herbal treatment. Todd is an advanced
botanical adherent. He believes almost anything can be accomplished
by herbs. And he says he has successfully treated one case."

"One swallow doesn't make a summer," remarked Mark, doubtfully.

"But it is enough that he wants us to find the herb," said the
professor, more vigorously.

"'Us'!" repeated Jack.

"And he will pay us any reasonable price for our work," added their
mentor.

"He really means to go!" cried Mark.

"I certainly do. I think you and Jack will accompany me," said the
professor, quietly. "I know that Washington will, and of course Andy
will not be left behind."

"Not if there'll be a chance at big game," declared the hunter. "I'm
with you, Professor Henderson."