"Then if it came out of a tree someone is up the tree!" declared Bert, "and I'm going to see who it is."
As he rushed forward a snowball struck him full in the face.
CHAPTER XIX
SNAP IS GONE
Dorothy screamed, and turned back toward Nan when she saw Bert struck with the snowball. But plucky Nan kept on.
"That must be Danny Rugg!" cried Bert's sister. "No one else around here would be as mean as that!"
Bert stopped a moment to brush the snow from his eyes, and then he rushed toward the tree.
"Who is it?" cried Harry.
"I don't know—but I'm going to find out," was Bert's answer. "Come along!"
The two boys hurried on, the girls lingering in the rear.