They did not go very close to the old mill, but halted at the foot of the trees before mentioned. Andy boosted the others into a tree and then climbed up himself. Then the acrobatic youth led the way, from one tree to another. All moved closer to the mill without making any noise.

There was no moon, but the stars were shining brightly, and by the light they saw the building loom up before them. Not a light was to be seen, and the only sound that reached their ears was the roaring of the Falls some distance away.

“Now then, be careful!” whispered Andy, as he moved out on the end of a limb. “Don’t make a noise when you drop on the roof.”

As he went out the limb bent beneath his weight until it rested on the shingles of the roof. He alighted on the top of the mill with ease, and one after another the others followed.

The limb bent beneath his weight.

The roof was of the low, gabled sort, with several windows at either end of the building, just below the top. Andy crawled over the shingles with the ease of a trained athlete and looked over the edge. One of the windows was within three feet of him and he noted with satisfaction that one of the sashes was completely gone and the other was minus its panes of glass.

“I’d hate to break any glass—it would make such a noise,” said he. “Now then, the rope.”

This was quickly made fast and Andy went down and crawled through the window into the loft of the mill. The others came after him. Then the five boys stood in a circle, almost holding their breath, and wondering what they had best do next.

“Well, we are in the place anyway,” murmured Pepper.