SIR,--In the interests of our national sport, which all Englishmen rightly regard as our most cherished possession, I call upon Lord Clarehaven to give a public explanation of his recent behavior. The facts are probably only too painfully known to many of your readers. In May Lord Clarehaven's horse, Full Moon, won the Two Thousand Guineas; two years ago his horse Moonbeam won the same race. Moonbeam ran fourth in the Derby and was transferred to the same stable as the winner, Chimpanzee. This horse, owned by Mr. Lionel Houston, was scratched for the St. Leger, and the race was won by Moonbeam. This was explicable; but when two years later another of Lord Clarehaven's horses wins the Two Thousand Guineas and finds his stable companion preferred to him to carry Lord Clarehaven's colors in the Derby, when, furthermore, the chosen filly runs like a plater, and when this morning we read that Full Moon, now in the ownership of Mr. Lionel Houston, has won the Grand Prix in a canter at a price which the totalizator puts at sixty-three to one, a proof that nobody in Paris considered the chances of this animal, the public may, perhaps, demand what it all means. They will ask still more when I inform them that I have absolute authority for saying that this horse was heavily backed in England, which proves that by some his chance was considered excellent. I have no wish to accuse his lordship of having deliberately deceived the public for his own advantage; but I do accuse him of folly that can only be characterized as criminal. Perhaps he has been the victim of his friend and of his trainer; at any rate, if his lordship was deceived about the chance of Vanity Girl, and if it is true that the defeat of Vanity Girl in the Derby represented to his lordship a loss of thousands of pounds in bets, he should make this clear. In that case I have no hesitation in accusing Mr. Lionel Houston, formerly known as Leopold Hausberg, of having deliberately conspired with the Starkey Lodge trainer to perpetrate a fraud not only upon their friend and patron, but also upon the public. I have the honor to be, sir, Your obedient servant, STILTON. Although Lord Stilton's letter hit the nail on the head, Tony was so furious at being called a fool in public that he sent the following letter to the paper: