four o'clock
Everything hangs on that . And to make sure there 's no hitch , I shall do exactly what I 've been told to do . I expect I shall be watched . I shall be there at four o'clock , and ten minutes after I hope we shall have laid hands on -- whoever it is . '' Walter nodded . `` I do n't see how we can fail , '' he said . `` No , '' Dunn agreed after a long pause .