“Look at the decoy-ducks,” whispered Dick, and then he watched in silence, for these two dozen were regularly fed wild-fowl which had become so far half tame that, knowing the appearance of the dog to be associated with corn and other seeds at the mouth of the pipe, they came at once.

This was too much for the strangers, which followed them, mingled with them, and began to feed as well.

Dave was at this time behind the second screen waiting for Chip, who showed himself for a moment or two at the edge of the long water ditch, trotted on towards the second screen, leaped over a low wood bar at the end, and joined his master, to receive a second piece of cheese.

That white dog was a wonder to the wild ducks, which left off eating directly and began to swim slowly and cautiously up the netted tunnel to try and find out what he was doing.

Had Chip stopped and looked at them, and barked, they would all have taken flight, but the dog was too well taught. He was a piper of the highest quality, and knew his business, which was to show himself for a short time and then trot on to the next screen and leap over and disappear just as if he were engaged in some mysterious business of his own.

This was too much for the ducks, which cackled and bobbed their heads up and down and swam on, moved by an intense curiosity to find out what was Chip’s particular game.

But Chip’s proceedings were stale to the decoy-ducks, who had seen him so often that they cared nothing, but stopped behind to partake of the food, while quite a hundred followed their leaders up the pipe in happy ignorance of the meaning of a net. What was more, the decoy-ducks often found food at the mouths of the pipes when their wild relatives were off feeding, and hence they troubled themselves no more. All that was impressed upon their small brains was that the appearance of Chip meant food, and they stayed behind to feed.

Chip was invisible eating a piece of cheese. Then he appeared again higher up, trotted on, leaped over the low wood bar, and joined his master for more cheese.

And so it went on, Dave going higher and higher from screen to screen, and the dog slowly following and alternately appearing to and disappearing from the sight of the ducks, which never of course caught sight of Dave, who was too well hidden behind the screens.

At last they were lured on and on so far by the dog that they were where the ditch began to bend round more sharply and the pipe was narrowing. This was the time for a fresh proceeding.