2 A.M.
A new problem arose : temperature . We were n't reproducing actual temperatures , but the rooms needed a marked change , for reality 's sake . I 'd insisted on that , and having won the point , was stuck with it . It was after 2 A.M. ; I was alone in the office . The sound of the outer door closing startled me . Footsteps approached ; I hurried to clean my desk , sweeping the bottle into the drawer . `` You 're up too late .