one o'clock exactly
`` Then I will awaken and feel quite fresh . I shall not be sleepy at all . '' He slept as soundly as a boy can sleep . And at one o'clock exactly he awakened , and found the street lamp still throwing its light through the window . He knew it was one o'clock , because there was a cheap little round clock on the table , and he could see the time . He was quite fresh and not at all sleepy . His experiment had succeeded again .