ten o'clock
`` I thank you , sister , for coming to me . We two shall save her -- we two alone , and nobody shall know anything about it . Even she herself must not find out that we know her secret . We must be brisk and determined , though , for it is late , only wanting a half hour of being ten o'clock . Who is old Trude ? '' `` Louise 's chambermaid , who has been with her all her life , for Trude was her nurse . She idolizes our sister , and would go through fire and water for her sake .