ten o'clock
`` What does it all mean ? '' `` It 's all very simple , if one looks at it from the right angle , Brock . Up to last night , I was blissfully committed to the most delightful of outings , so to speak . At ten o'clock everything was changed . Mrs. Medcroft and I sat up all night discussing the situation with the messenger -- my solicitor , by the way . The Vienna trip is out of the question , so far as I am concerned . It is of vital importance that I should return to London to-night , but is even more vitally important that the world should say that I am in Vienna .