four o'clock
But now that Isaacson saw these two people together , he realized the truth of their relations as words could never have made him realize them . There was a little silence , broken only by the tiny whisper of the faskeeyeh . Then Mrs. Armine said gently : `` Now , Nigel , you 've had your surprise , and you ought to sleep . Doctor Isaacson 's coming back to-morrow to have a consultation with Doctor Hartley at four o'clock . '' She spoke as if the whole matter were already arranged . `` Sleep ! You know I ca n't sleep .