eight o’clock
But who can tell ? There may be things stirring beneath that torpid brain of yours of which no other person knows save yourself . '' The concentrated gaze of Mr. Fentolin 's keen eyes was hard to meet , but Hamel came out of the ordeal without flinching . `` At eight o'clock , Mr. Fentolin , '' he answered . `` I can see that I must try to earn your better opinion . '' Hamel read steadily for the remainder of the morning . It was past one o'clock when he rose stiffly from his seat among the sand knolls and , strolling back to the Tower , opened the door and entered .