But it was not his appearance which made Peter stare; it was what he was doing. He was walking about and every now and then picking up something quite as if he were getting his breakfast in that gravel pit, and Peter couldn't imagine anything good to eat down there. He knew that there were not even worms there. Besides, Mourner is not fond of worms; he lives almost altogether on seeds and grains of many kinds. So Peter was puzzled. But as yon know he isn't the kind to puzzle long over anything when he can use his tongue.

"Hello, Mourner!" he cried. "What under the sun are you doing in there? Are you getting your breakfast?"

"Hardly, Peter; hardly," cooed Mourner in the softest of voices. "I've had my breakfast and now I'm picking up a little gravel for my digestion." He picked up a tiny pebble and swallowed it.

"Well, of all things!" cried Peter. "You must be crazy. The idea of thinking that gravel is going to help your digestion. I should say the chances are that it will work just the other way."