Tommy Twister’s Discovery 251

reasoning, and was a sort of mixture of his
knowledge of Euclid and his own common-
sense.

This thought showed him what to do.
Beyond the garden was a little wood with
trees in it.

Now Tommy had seen the
gardener graft a piece of one
tree on to another tree, and
had seen that the grafted piece
grew. This Noah’s ark was
a piece of a tree; and con-
sequently if it were grafted on
another tree z¢ would grow.

“Q. E. D.” murmured Tommy,
and carried the ark into the wood.

Then, selecting a healthy tree,
he cut a snick in it with his pen-
knife and inserted the end of the ark, and
bound the bark of the tree over it, and then
covered the joint with moist clay ; just as the
gardener was in the habit of covering Azs grafts.

Several times every day he went to look
at the ark, saying nothing about the affair to
anybody.