fifteen
o'clock
`` Then if you 'll be so good as to return to your own quarters , '' Muller said , holding himself back with an effort that turned his face red , `` we 'll start clearing this up . And not a word of this . '' Napier , Lomax , Pietro and I went back to the scientists ' quarters , leaving Muller and Jenny conferring busily . That was at fifteen o'clock . At sixteen o'clock , Pietro issued orders against smoking . Dinner was at eighteen o'clock . We sat down in silence .