twelve o'clock
We can hide in the bushes opposite the room and hear 'em call for help . Then we can rush up and pretend we came to the rescue . That will be a good excuse in case we 're caught watching the game . '' Both assistants retired early , and the boys knew that twelve o'clock would find them both sound asleep . After a stroll about the college grounds , taking care not to venture into the light but keeping well in the shadows , Jack announced it was the hour for the show to commence . `` Better let Nat do the talking , '' Jack advised Will . `` Have you got anything to disguise your voice , Nat ? ''