"Oh, it's a man! A man!" cried Janet, running out from Uncle Toby's bedroom into the living apartment where they were now all gathered. "A man looked in the window at me and he tapped on the glass!"

"Who was he?" asked Uncle Toby, grasping a heavy stick of wood. Tom, Ted and Harry at once began to think they had better take some sticks, too, in case there might be a fight. "Was it Jim Nelson?" went on Uncle Toby. "Sometimes he taps on my window when he comes around by the side path."

"I—I couldn't see who it was—except that he was a man," stammered Janet. "As soon as he saw me looking at him he ran away."

"Jim Nelson wouldn't do that unless he was playing a trick," decided Uncle Toby. "And Jim isn't that kind of a man. He wouldn't scare children. I must see who this is!"

"Maybe he's the tramp we saw over at the place where you got the pail of water this afternoon," said Ted.

"Maybe," agreed Uncle Toby. "Well, if he's a poor man and in trouble I'm sorry for him. But he hasn't any right to come sneaking around my cabin, tapping on the window. I'll see about this!"

Uncle Toby went outside, and the boys followed. Trouble wanted to go with Ted, but Janet held back her little brother.

In the moonlight, which was brighter now, as the clouds had blown away, Uncle Toby made a trip around the cabin, taking Skyrocket with him, while the boys, each with a chunk of wood as a weapon, followed Mr. Bardeen.

Uncle Toby called loudly to know who was in the woods, and the dog barked, but no man answered.

"I can't find any one," Uncle Toby announced, coming back into the cabin with the boys. "It's too dark to see if there are any strange footprints in the snow, and I don't believe we could tell by them anyhow, as Jim Nelson and some of his friends have been tramping around here the last few days, bringing in wood and things. Are you sure you saw a man at the window, Janet?"