[ Autograph ] Erastus Corning 1794-1872 American businessman and railroad president, first president of the New York Central. A.L.S. 1p. 8vo., Washington, Mar. 28, 1862 to Gen. A. Porter, Washington Provost Marshall. Corning requests that the bearer of the letter be permitted to cross to the south side of the Potomac. Just a tad light, otherwise good.