"That reminds me," said Peter. "Those folks you have mentioned nest in holes in trees; do you?"

"I should say not," retorted Creeper. "I don't know of any Warbler who does. I build on the ground, if you want to know. I nest in the Green Forest. Sometimes I make my nest in a little hollow at the base of a tree; sometimes I put it under a stump or rock or tuck it in under the roots of a tree that has been blown over. But there, Peter Rabbit, I've talked enough. I'm glad you're glad that I'm back, and I'm glad I'm back too."

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.