two o'clock
As quickly as possible I re-entered the house , secured the door by which I had made my exit , and returned again to my room with the awful knowledge of my sister 's crime upon my conscience . '' `` What hour was that ? '' `` When I retired again to bed my watch showed that it was barely half-past one . At two o'clock Short , awakened by his alarum clock , made the discovery and aroused the house . What followed you know well enough . I need not describe it . You can imagine what I felt , and how guilty was my conscience with the awful knowledge of it all . ''