two o'clock
A light under the library door . Well and good . How -- she wondered -- did he occupy himself there , through so many solitary hours ? Once or twice she had heard him come upstairs to bed , and never before one or two o'clock . Suddenly she stood abashed . She had thrown open the drawing-room door , and the room lay before her , almost in darkness . One dim lamp still burned at the further end , and in the middle of the room stood Mr. Helbeck , arrested in his walk to and fro , and the picture of astonishment .