United States. (Transatlantic Mails). 1857. Folded letter addressed to Arnheim, Holland cancelled by New Orleans/ La. date stamp 'Sep 13 1857', endorsed 'Per First steamer via Liverpool' with Boston transit 'Boston/ 3/ 23 Sept) French Convention Mail)m with 'Et Unis Serv. Br. A.C.' ambulant in black '5th Oct', manuscript '21' (U.S. inland postage 5c + 16c sea postage), Paris transit and Arnheim arrival '7th Oct' on reverse and manuscript '60' Dutch cents due rating.