about one
o'clock
Then I got out of bed to try if there was a way of escape by the old-fashioned chimney , barred across as it was , at intervals , by strong old iron bars . I had never thought the chimney possible , having examined it before , when I first came to that house ; but my fever made me think all things possible ; so up I got , hoping that I should have light enough to work by . It was too dark to do much that night , but I spent an hour in picking mortar from the bricks into which the lowest iron bar had been let . After a brief sleep I woke in the first of the light -LRB- at about one o'clock -RRB- ready to go at it again . My fever was hot upon me . I do n't think that I was quite sane that day ; but all my reason seemed to burn up into one bright point , escape , escape at all costs , then , at the instant . I must tell you that the chimney , like most old chimneys , was big enough for a big boy to scramble up , in order to sweep it .