Letter to His Royal Highness Monsieur Brother to Louis XVIII. King of France, ... from Colonel John Gordon Sinclair, Relative to His Trial in the Court of King's Bench; the Various Concealed Methods Used to Effect His Ruin; and Finally, to Indict Him for Having Denied a Receipt Produced by Monsieur de Calonne; Followed by the Affadavits Read in Court, and Other Proofs of the Colonel's Military Talents, His Honour, and Innocence