There was no time to think long, for the sleep-walker was already descending the back stairs slowly and noiselessly. Dave hurried into the dormitory, set down the pitcher, and aroused Roger, who was nearest to him.
"Come, quick!" he whispered. "Slip on your clothes, and don't make any noise."
"Oh, I'm too sleepy for fun!" murmured Roger.
"This isn't fun, it's important. Come, I say!"
Thus aroused, the senator's son rolled from his couch and hurried into his clothing. In a few minutes both boys had their shoes and caps on, and along the hallway they sped, and down the back stairs. The door below was unlocked, but closed. Soon they were out in the rear yard of the Hall, and there they beheld Shadow Hamilton walking slowly in the direction of the boathouse.
"Who is it?" whispered Roger.
"It is Shadow. He is walking in his sleep. I want to find out where he is going and what he'll do."
"Humph! This certainly is interesting," answered the senator's son.
"Whatever you do, Roger, don't arouse him, or there may be an accident," cautioned Dave. "Let him go his own way."
"But he may hurt himself, anyway."