eight o'clock
`` It 's very sensible , I 'm sure , '' declared Cyril . `` Still , I must confess , I would have liked to pick out her piano teacher for her . '' William said nothing -- perhaps because he was reading Billy 's letter again . At eight o'clock that night Bertram tapped on Cyril 's door . `` What 's the trouble ? '' demanded Cyril in answer to the look on the other 's face . Bertram lifted his eyebrows oddly .