twelve o'clock
`` Your treatment seems to be doing wonders . '' `` It seems to me he is doing well , doctor , but I am afraid he is carrying it too far ; he is so weak he can hardly stand . '' `` Never mind that , '' the doctor said ; `` it will be easy enough to build him up when we have once got the Plague out of him . I have told him to have another turn in the blankets at twelve o'clock to-night ; it will not do to let the malady get a fresh hold of him . But do n't push it too far , lad . If you begin to feel faint , stop it , even if you have not been a quarter of an hour in the blankets . Do not cover yourself up too warmly when you have done ; let nature have a rest .