"It's part of a jaw of a mammoth many thousands of years old, and there
are two teeth in perfect preservation," old Principle said solemnly.

"Where did you find it?"

"Ah, you must come and see! In a cave that I have only just discovered,
and which must originally have been by the side of a river. I'll take
you there to-night if you can get permission to come."

Nothing delighted the boys more than an expedition with old Principle.
They promised to be down at his shop punctually at half-past seven that
evening, and then the conversation drifted into other channels.

"Old Principle, do you think we ought to make opportunities?" questioned
Dudley, presently; "Roy thinks we ought, and I did make one the other
day, but it didn't turn out well."

"Ay, Master Roy is always for making," said the old man with a smile;
"he will try and cram his life with what will come fast enough
naturally, if he only waits."

"But will it?" questioned Roy, flushing up with eagerness; "do you
think it will? I'm longing to do something big and grand and good; I
mayn't live to grow up you know, and I'm sure we're meant to do
something when we're boys."

"We're trying to do good to all men as we have opportunity," said
Dudley, gravely.