Several times he whistled so, on different notes; and then, to her surprise, the watching girl saw the little wild thing outside stir in answer to the call.

Sami came out from behind the post and stood listening, for all the world like an inquiring squirrel.

The whistle sounded again, a plaintive, seeking sound, infinitely alluring.
It seemed to draw the heart like a living thing.

Slowly at first and then with the swift, gliding motion of the woods, the wide-eyed youngster approached the open door and stood there waiting, poised and ready for advance or flight.

Again the whistle came, and to it came Sami, straight as a bird to its calling mate.
"Tamed!" said the professor softly.