rom feeling heavy blows.
It had two horns on its ugly snout.
They kept it safe from harm.
When it was not disturbed it was a peaceable animal.
But when it was attacked there was no animal that was more fierce.
The other animals learned to let it alone.
Sometimes the wolves and hyenas frightened it over a precipice.
But it was a long time before men tried to hunt it.

THINGS TO DO

_Tell a story of how the wild animals were taught to let the woolly
rhinoceros alone._
_See if you can find an animal that has both an inner and an outer
coat._

XXXIII.

_How We Have Learned About the Tree-dwellers_

The Tree-dwellers lived such a long time ago that we do not know all
that they did.
But they have left some things to tell their story.
A few of their bones and stone weapons have been found in the gravel.
We have learned something about the Tree-dwellers from studying these.
Bones of animals that lived then have been found in the caves.
They tell something more about the life of the Tree-dwellers.
Marks of plants have been found upon the rocks.
They, too, help to tell the story.
Wise men have studied all these things.
They have tried to learn all that they could about these people.
We have written their story in this book for you, so that you may know
how our forefathers lived before they learned how to use fire.

[Illustration]

SUGGESTIONS TO TEACHERS

[Illustration]

The test of a book is the service it can render. The character of the
service demanded by it is determined by the needs of those to whom it is
devoted. This book was not written for the child of five or six years,
although children of that age have shown an interest in it. The child of
five or six is absorbed in the activities of his own home and his
immediate environment. His own neighborhood may well constitute the
chief source from which to draw the subject-matter in these early years.
Even though many of the processes that he observes are complex, it
matters little to the child at this time; for so easily do they lend
themselves to dramatic play that they cause him little difficulty. The
child at this time, therefore, has no need of this book.

But there comes a time when the ideal and the real world begin to
separate. No longer content with a "make-believe" process, and unable to
control the complex processes of modern life, he feels a need that
cannot be satisfied by