midnight
It was to be a masquerade , and he had to dig up the costume used at the Opera House a couple of months before . Also , he had to shave and to eat . Thus it was that he , alone of all interested , was unaware of Flossie 's proximity . `` Have them down to the water-hole off the hospital , at midnight , sharp . Do n't fail me , '' he said to Sitka Charley , who dropped in with the advice that only one dog was lacking to fill the bill , and that that one would be forthcoming in an hour or so . `` Here 's the sack . There 's the scales .