Martin Hewitt, Investigator by Arthur Morrison

It was, of course, always a part of Martin Hewitt's business to be thoroughly at home among any and every class of people, and to be able to interest himself intelligently, or to appear to do so, in their various pursuits. In one of the most important cases ever placed in his hands he could have gone but a short way toward success had he not displayed some knowledge of the more sordid aspects of professional sport, and a great interest in the undertakings of a certain dealer therein.

The great case itself had nothing to do with sport, and, indeed, from a narrative point of view, was somewhat uninteresting, but the man who alone held the one piece of information wanted was a keeper, backer, or "gaffer" of professional pedestrians, and it was through the medium of his pecuniary interest in such matters that Hewitt was enabled to strike a bargain with him.