THE EPISODE OF THE SELDON GOLD-MINE On our return to London, Charles and Marvillier had a difference of opinion on the subject of Medhurst. Charles maintained that Marvillier ought to have known the man with the cropped hair was Colonel Clay, and ought never to have recommended him. Marvillier maintained that Charles had seen Colonel Clay half-a-dozen times, at least, to his own never; and that my respected brother-in-law had therefore nobody on earth but himself to blame if the rogue imposed upon him. The head detective had known Medhurst for ten years, he said, as a most respectable man, and even a ratepayer; he had always found him the cleverest of spies, as well he might be, indeed, on the familiar set-a-thief-to-catch-a-thief principle. However, the upshot of it all was, as usual—no