nine o'clock
said King , as the three of them reached the nursery . `` Of course we will , '' agreed Marjorie . `` What shall we do ? '' `` Let 's see , it 's nine o'clock . We can play anything till half-past ten ; after that we can only do quiet things . Let 's play Blind Man 's Buff . '' `` All right , you be _ it _ . ''