Including a Refutation of the Statement Contained in Mr. Fox's Introductory Letter, Observations on Talleyrand's Answer of the 5th March, Discussed in the House of Commons, 30th December, 1806, and in the House of Lords, January 3d, 1807, and Remarks on Some Parts of "The State of the Negotiation," which Have Not Been Noticed in that Incomparable Pamphlet, A Vindication of the Court of Russia, Particularly in Regard to the Oriental Administration of the Marquis Wellesley