Washington, D.C., May 28, 1870. Sir: Mr. Lynch Has, on the Floor of the House, Seen Fit to Attack My Character and Motives ... He Charges Me Directly with Being in the Interest of Scotch Ship-builders, And, Consequently, Opposed to that of My Own Country. This is the Slander Which, with the Aid of Caricatures, Has Been the Argument of the "Association of Ship-builders [i.e. Ship-builders' Association of New York]," Whose Schemes for Obtaining Bounties on Coasting Vessels I Have Unmasked, in Connection with My Plea for Free Ships. ...