Ward Hunt, Arthur v. Unkart — Opinion of the Court
“ Simply holding the goods for duty was not, therefore, of itself an illegality. It was only when they were held for more duty than the law justified that it became duress and illegal; and, to entitle himself to recover for the illegality, the plaintiff must show such excessive charge. If the collector had no authority in the premises, and could hold the goods for no amount whatever, a different question would arise. But here the very issue was as to amount, and the proof, therefore, of illegal amount rested upon the plaintiff. ”
