Peter looked puzzled. He was puzzled. But before he could ask another question a rollicking song caused both of them to look up. There on quivering wings in mid-air was the singer. He was dressed very much like Jimmy Skunk himself, in black and white, save that in places the white had a tinge of yellow, especially on the back of his neck. It was Bubbling Bob the Bobolink. And how he did sing! It seemed as if the notes fairly tumbled over each other. Jimmy Skunk raised himself on his hind-legs a little to see just where Bubbling Bob dropped down in the grass. Then Jimmy began to move in that direction. Suddenly Peter understood. He remembered that Bubbling Bob's nest is always on the ground. It was his eggs that Jimmy Skunk was looking for. “You don't happen to have seen Mrs. Bob anywhere around here, do you, Peter?” asked Jimmy, trying to speak carelessly. “No,” replied Peter. “If I had I wouldn't tell you where. You ought to be ashamed, Jimmy Skunk, to think of robbing such a beautiful singer as Bubbling Bob.” “Pooh!” retorted Jimmy. “What's the harm? If I find those eggs he and Mrs. Bob could simply build another nest and lay some more. They won't be any the worse off, and I will have had a good breakfast.” “But think of all the work they would have to do to build another nest,” replied Peter. “I should worry,” retorted Jimmy Skunk. “Any one who can spend so much time singing can afford to do a little extra work.” “You're horrid, Jimmy Skunk. You're just horrid,” said Peter. “I hope you won't find a single egg, so there!” With this, Peter once more headed for the dear Old Briar-patch, while Jimmy Skunk continued toward the place where Bubbling Bob had disappeared in the long grass. Peter went only a short distance and then sat up to watch Jimmy Skunk. Just before Jimmy reached the place where Bubbling Bob had disappeared, the latter mounted into the air again, pouring out his rollicking song as if there were no room in his heart for anything but happiness. Then he saw Jimmy Shrunk and became very much excited. He flew down in the grass a little farther on and then up again, and began to scold. It looked very much as if he had gone down in the grass to warn Mrs. Bob. Evidently Jimmy thought so, for he at once headed that way. When Bubbling Bob did the same thing all over again. Peter grew anxious. He knew just how patient Jimmy Skunk could be, and he very much feared that Jimmy would find that nest. Presently he grew tired of watching and started on for the dear Old Briar-patch. Just before he reached it a brown bird, who reminded him somewhat of Mrs. Redwing and Sally Sly the Cowbird, though she was smaller, ran across the path in front of him and then flew up to the top of a last year's mullein stalk. It was Mrs. Bobolink. Peter knew her well, for he and she were very good friends.