three
o’clock
He had vaguely wondered at the time why he had expected the door to be shut , but he had had no time then to worry the thing out , and he had promised himself to look into it at his leisure afterwards . Possibly it meant nothing ; possibly , if it meant anything , he could have found out its meaning by a visit to the office that morning . But he had felt that he would be more likely to recapture the impressions of yesterday if he chose as far as possible the same conditions for his experiment . So he had decided that three o'clock that afternoon should find him once more in the office . As he went into the room , followed by Bill , he felt it almost as a shock that there was now no body of Robert lying there between the two doors . But there was a dark stain which showed where the dead man 's head had been , and Antony knelt down over it , as he had knelt twenty-four hours before . `` I want to go through it again , '' he said .