twelve o'clock
`` Wait and watch -- closely , closely -- do n't breathe or speak . It is near twelve . Watch ! Do not take your eyes off them ; and at twelve o'clock , when you see one of the cups move , then you must seize it -- seize it , and seize Nina 's hand ! -- and hold her fast ! Oh , I can tell you she will not leave us any more -- not when I have spoken to her and told her how cruel it was of her to go away . I do not know where she is now ; but at twelve , all of a sudden , there will be a kind of trembling of the air -- that is Nina -- for she has been here before ; how long to twelve now , Maurice ? ''