about noon
`` That was his private office , '' Harding replied , pointing to the little ante-room . `` When do you expect the relieving officer to arrive ? '' `` I can hardly say . He may come by train to the junction , in which case he should be here about noon to-morrow . '' `` Then you will be in charge until he arrives ? '' `` I have telegraphed to the head office reporting that Eustace has disappeared and asking for instructions . Until they come , of course , I am in charge . ''