Creeper continued on up the trunk of the tree, picking here and picking there. Just then Peter caught sight of another friend whom he could always tell by the black mask he wore. It was Mummer the Yellow-throat. He had just darted into the thicket of bushes along the old stone wall. Peter promptly hurried over there to look for him. When Peter reached the place where he had caught a glimpse of Mummer, no one was to be seen. Peter sat down, uncertain which way to go. Suddenly Mummer popped out right in front of Peter, seemingly from nowhere at all. His throat and breast were bright yellow and his back wings and tail a soft olive-green. But the most remarkable thing about him was the mask of black right across his cheeks, eyes and forehead. At least it looked like a mask, although it really wasn't one. “Hello, Mummer!” cried Peter. “Hello yourself, Peter Rabbit!” retorted Mummer and then disappeared as suddenly as he had appeared. Peter blinked and looked in vain all about. “Looking for some one?” asked Mummer, suddenly popping into view where Peter least expected him. “For goodness' sake, can't you sit still a minute?” cried Peter. “How do you expect a fellow can talk to you when he can't keep his eyes on you more than two seconds at a time.” “Who asked you to talk to me?” responded Mummer, and popped out of sight. Two seconds later he was back again and his bright little eyes fairly shone with mischief. Then before Peter could say a word Mummer burst into a pleasant little song. He was so full of happiness that Peter couldn't be cross with him. “There's one thing I like about you, Mummer,” declared Peter, “and that is that I never get you mixed up with anybody else. I should know you just as far as I could see you because of that black mask across your face. Has Mrs. Yellow-throat arrived yet?” “Certainly,” replied another voice, and Mrs. Yellow-throat flitted across right in front of Peter. For just a second she sat still, long enough for him to have one good look at her. She was dressed very like Mummer save that she did not wear the black mask. Peter was just about to say something polite and pleasant when from just back of him there sounded a loud, very emphatic, “Chut! Chut!” Peter whirled about to find another old friend. It was Chut-Chut the Yellow-breasted Chat, the largest of the Warbler family. He was so much bigger than Mummer that it was hard to believe that they were own cousins. But Peter knew they were, and he also knew that he could never mistake Chut-Chut for any other member of the family because of his big size, which was that of some of the members of the Sparrow family. His back was a dark olive-green, but his throat and breast were a beautiful bright yellow. There was a broad white line above each eye and a little white line underneath. Below his breast he was all white.