twelve o'clock
`` Then let 's be sensible , '' he said . `` You and Miss Dunning can have my tent as soon as we have supper . '' `` Supper ! '' `` Supper is served to all on duty at twelve o'clock , and we 're on duty , are n't we ? They 're about ready to serve now ; we eat in the tent , '' he added , holding out his hand as he heard the patter of raindrops . `` Rain again ! No matter , we shall be dry under canvas . ''