"Be careful," warned his father. "I'll be home for luncheon and we'll talk more then."
Heinrich appeared with the car and Mr. Cook got in and was soon on the way to his office. Bob hurried into the house to telephone to Hugh and possess himself of his father's automatic pistol.
Hugh promised to hurry over as fast as he could, and he could tell from the tone of Bob's voice that something stirring was on foot. Bob had answered his question about the car evasively and he was anxious to hear the latest developments. Consequently by the time that Bob had tucked the pistol safely in his back pocket and had gone to the garage for his bicycle, Hugh appeared.
Bob related the story of the car and its strange return, and also told about the postal card his father had received that morning. The mystery seemed to deepen rather than clear up, and both boys were profoundly mystified by the strange events of the previous day.
"Your eye's better anyway," remarked Hugh.
"Yes," said Bob. "But I may get another one to-day."
"We'll hope not. When do you want to start?''
"Right away."
"Come ahead then," and jumping on their bicycles the two boys pedalled out of the yard. Little did they dream that bright April morning, as they rode along, that they were headed for adventures which would make the events that had gone before appear mild in comparison.