two o'clock
`` Who called the fellows that were to relieve you ? '' `` I did , '' answered Lyons . `` Did n't you miss Dorner and Murray ? '' `` I did n't notice them ; but I did see the three fellows who went on guard at two o'clock . They started for their stations , and I turned in , without thinking anything about Dorner and Murray . '' It further appeared that the two traitors had used some `` shuffling '' to obtain the east and south stations . It was evident now that the conspirators had executed their plan shortly after midnight , while their associates were on guard at the two posts where their operations could be seen or heard .