Gen. Cass And The Wilmot Proviso

As the letter of Gen.Cass to Mr. Nicholson Wil] have an important hearing on his prospecta as a Presidential candidate. and is a carefully written exposition of his opinions on the Mexican War and the Wilmot Proviso, we have inserted it at lenglh. All our readers can judge from it what may be expecled in cnse of his election - War, Conquest, a grent National Debt, and the extensión of Slavery. We intended to append some remarks on the reasonings of ihis letter, but wanl of space compels us to postpone tiiem.