Lying in every direction, and quite filling the little hollow, were round mounds of earth, each one having a hole in the center. The mounds were about two feet high and as big around as a wash-tub, and the edges of the holes were pounded hard and smooth by the pattering feet of the little creatures that lived within.
"Isn't it funny!" said Chubbins, staring at the mounds.
.....
"How d' you know, Twink?"
"Papa has told me about them, lots of times. He says they're so shy that they run into their holes when anybody's around; but if you keep quiet and watch, they'll stick their heads out in a few minutes."