3 o'clock
CHAPTER V. -- The Typewriter Girl 's Tip . Fred and Bob came away from the restaurant with the two girls , going toward Wall Street . Fred asked Callie several questions about the deal she had mentioned . `` I 'll make a note of what I can find out , '' she said to him , `` and let you know after 3 o'clock . '' `` But be careful and let no one else know it , '' he replied . `` Oh , I can keep a secret even if I am a girl , '' and she left him on the corner of Nassau and Wall to go to the bank . Fred clutched Bob 's arm when the two girls were gone , and said : `` Callie says a big corner in Pacific Mail is being made up in Barron 's office . ''