54 U.S. 274 54 U.S. 274 13 How. 274 14 L.Ed. 143 WILLIAM W. DE FOREST, GEORGE F. THOMAS, AND ROBERT W.RODMAN, PLAINTIFFS IN ERROR,v.CORNELIUS W. LAWRENCE, LATE COLLECTOR OF NEW YORK. December Term, 1851 1 They must be regarded as a non-enumerated article, and charged, with a duty of twenty per cent. ad valorem. […]