..., a dissolution of the Union and the establishment of a separate Confederation, he knew from unequivocal evidence, although not provable in a court of law; and that in case of a civil war, the aid of Great Britain , to effect that purpose, would be assuredly resorted to, as it would be indispensably necessary to their design. See Mr. Adams' letter of Dec. 30th, 1828, in reply to Harrison Gray Otis and others....