midnight
`` But how 'll we do it , Peter ? '' asked Fred weakly . `` There 's only one way . We 'll wait till after midnight , when they 'll be asleep , and then burst in the door , aim our rifles at them , and get hold of their guns before they can recover their wits . '' `` They 'll have the door barricaded . We 'll be shot down before we can break in . '' `` I know it 's a long chance , but we 're living by a succession of miracles as it is .