Again a snowball flew out of the tree, but it struck no one, though coming near to Nan.
By this time Bert was close to the tree. It was a hemlock, and the branches were quite thick, but Bert got a glimpse of someone hiding among them.
"Come down out of that!" Bert cried. "I see you!"
There was no answer.
"What do you mean by hitting us?" asked Harry angrily. "We didn't do anything to you."
Still there was no answer.
"I'm going to do some snowballing on my own account," spoke Bert. "Here goes!"
He quickly made a hard ball, and, circling around the tree to find an opening in the branches, he saw the figure of the boy more plainly.
"Danny Rugg!" cried Bert. "So it's you; is it? First you start a snowslide down on us and then you snowball us. This has got to stop. Take that!"
Bert threw, but though his aim was good, Danny, for it was the bully, managed to climb up higher in the tree, and the snowball broke into pieces against the branches.