..., May 1, 1861. Mr. Editor: --We, the undersigned, do hereby certify that on the 2d day of May inst., we heard Lewis A. Myers, who has been writing in the Clerk's office of the Circuit Court of Harrison county for the last eight months, and is now at this place, say in the presence of several persons, that he had seen the correspondence from Gen. Cameron, Secretary of War of the Black Republican Administra...