eight o'clock
Charley showed Mrs. Morton how to wire the cells and couple them to the instruments . Then he told her how to adjust her spark-gap and tune the instrument to any given wave-length . He compared his watch with the clock on the wall . `` At eight o'clock every night , '' he said , `` I will call you up . Suppose you take Mr. Morton 's initials as your call signal . What are they ? '' `` J. V. M. , '' replied Mrs. Morton .