Please be quiet. I shall have to whistle loudly, for the train makes such a noise and it may be some of my dear pets may not hear me!"
"Humph! Then you better whistle for all you're worth!" returned the man of weight.
Walking slowly up and down the sleeping-car Professor De Haven commenced to whistle in a clear, steady trill. He kept this up for fully a minute and by that time several white mice had shown themselves. They were somewhat scared, but gradually they came to him and ran up on his shoulders.
"Well, doesn't that beat the Dutch!" whispered Roger, half in admiration.
"I shouldn't have been so scared If I had known they were educated," returned Phil.
"Hush!" said Dave. "Give him a chance to gather them all in."
Placing the captured mice In their cage, the professor moved up and down the car once more, opening the berth curtains as he did so. He continued to emit that same clear trill, and soon his shoulders were full of the white mice.
"Only one is missing, little General Pinky," he announced.
"Spit, spat, spow! Where did Pinky go?" murmured Phil.
"Ha! I have him! Dear little Pinky!" cried the professor, as the mouse dropped onto his
