UNCLE TOM'S CABIN.—Mr. BEEKMAN, the London publisher of this famous work, is now in Boston, and says that the number of copies already issued in England is 400,000. The American publishers confess to have published some 200,000. One edition has been published by the celebrated TAUCHNITZ, of Leipsig, for which Mrs. Stowe has written a preface. Messrs. JEWETT are preparing an elaborately illustrated edition for the holidays. It is said that autograph letters, highly complimentary, have been received by the authoress from Prince ALBERT and the late Duke of WELLINGTON. Probably no literary work ever published has had such remarkable success as this.