It was a whistle, low and penetrating, and would seem to have risen from the wood beyond the stream.

I noticed that Tommy was alert and listening.

"Whoo—ee."

Again it rose, with something of caution in its tone, but a spice of daring in the higher note of its conclusion.

I watched Tommy, idly, with half-closed eyes.

He was performing a rapid toilet.

Presently he looked up at me from his shoe-laces.

"I taught her that whistle," he observed, complacently.

"Whom?" I asked.