"Now we will have to watch Downy or he will be sure to take that trip
again," said Bert, as they reached home with the enterprising duck.

"We could build a kind of dam across the narrowest part of the lake,"
suggested Hal; "kind of a close fence he would not go through. See,
over there it is only a little stream, about five feet wide. We can
easily fence that up. I've got lots of material up in our garden
house."

"That would be a good idea," agreed Bert. "We can put Downy in the
barn until we get it built. We won't take any more chances." So
Downy was shut up in his box, back of the donkey stall, for the rest
of the day.

"How far back do these woods run?" Harry asked his companions, he
always being interested in acres, as all real country boys are.

"I don't know," Hal Bingham answered. "I never felt like going to the
end to find out. But they say the Indians had reservations out here
not many years ago."

"Then I'll bet there are lots of arrow heads and stone hatchets
around. Let's go look. Have we time before dinner, Bert?" Harry
asked.

"I guess so," replied the cousin. "Uncle William's train does not get
in until seven, and we can be back by that time. We'll have to slip
away from Freddie, though. Here he comes. Hide!" and at this the
boys got behind things near the donkey house, and Freddie, after