eight o'clock in the morning
Rhinds and Radwin talked in whispers , behind the locked door of another room . They chuckled a long while , then shook hands and went to bed . The boys , however , as we know , were safely aboard the submarine . Mr. Farnum had left a call for eight o'clock in the morning . It was about twenty minutes later that Farnum and Pollard knocked loudly on the door of the room occupied by Rhinds . `` Well ? '' demanded Mr. Rhinds , opening the door , and appearing , minus coat and vest .