the sound of machinery will drown out any noises from outside. It's our only chance to get into the mill."
"Lead the way, then."
Frank began to ascend the willow tree.
It was difficult work, for although the tree was large, it bent and swayed under his weight. It was impossible for both of them to attempt to climb at the same time, and Joe was forced to wait on guard at the bottom, listening as his brother made his way higher and higher among the springy branches.
The topmost branches drooped over the roof of the mill, and when at length Frank had reached them he swung himself over until his feet touched the top of the building. For a second or so he was uncertain of his footing but at length he was able to stand steadily on the sloping surface. He released his grasp and the branches swished back. So far he had been able to move with a minimum of noise and he was confident that his ascent to the roof had been unheard.
He called softly to Joe, and in a few minutes a rustling among the branches indicated that his brother was also climbing the tree.
Frank waited and directed his brother so that Joe was soon swinging out from the branches. He dropped lightly to the roof of the old mill.
