five o'clock
The doctor stretched himself and stamped his foot repeatedly . `` Better come along and take a drive with me . You can take the time off that he allowed for the examination , and -- '' `` Not at all , '' said Bibbs . `` I 'm going to stand by my old zinc-eater till five o'clock . I tell you I LIKE it ! '' `` Then I suppose that 's the end of your wanting to write . '' `` I do n't know about that , '' Bibbs said , thoughtfully ; `` but the zinc-eater does n't interfere with my thinking , at least .