four o'clock
`` I 'll explain in good time , Harry , '' and it was not until they were leaving Police Headquarters that his apathy vanished . `` When are you to see Mrs. Brewster ? '' he asked . `` She will be at our office at four o'clock . Say , Phil '' -- but Rochester , shaking off his detaining hand , darted across the street and sprang into a passing taxi bearing the sign , `` For Hire , '' and that was the last Kent had seen of his elusive partner . Kent dropped into his chair and glanced askance at the mail piled in neat array on his desk ; he was not in a frame of mind to handle routine office business . Other clients would have to wait until later in the day .