nine o'clock
`` Ai n't you working to-night ? '' The newcomer was none other than Emil Pilz , _ Konzertmeister _ of the Palace Theatre of Varieties , if that dignified term may be applied to the first violin of an orchestra of twenty . `` I am and I ai n't , '' Emil replied . `` I 've got a job , Louis , which it would take me till nine o'clock , so be a good feller and substitute for me at the theayters till I am coming back . '' `` And who would substitute for me , Emil ? '' the professor asked . `` That 's all right , '' Emil replied .