nine o'clock before
`` Time is invaluable to us . Perhaps , '' he added , hopefully , `` Brother Gregorio will be pottering around and will catch your signal . '' Jack shook his head doubtfully . `` The good monks used to be in bed at nine o'clock before we put in the radio set for them . And they 've still got sleepy habits . But we 'll see . '' He walked to where Bob and Frank were putting the finishing installation touches to the generator .