Following Monies: The New Orleans Specie Market, Merchant Finance, and the Historical Evolution of International Payment Infrastructures

International payments preceded modern banking, yet historians have rarely examined how they were organized under international bimetallism. This essay reconstructs the New Orleans specie market between 1839 and 1861 to argue that merchant finance constituted the principal institutional arrangement through which cross-border payments operated before the international gold standard. Shipment-level evidence from the New Orleans Price -Current reconstructs a regional payment system linking Mexican silver, Californian gold, bills of exchange on London, and merchant-financial firms in New Orleans. Rather than treating specie movements as isolated monetary flows, the essay interprets them as the observable traces of an institutional order connecting mining districts, payment centers, commodity markets, and long-distance trade. By placing merchant finance at the center of the analysis, it brings business, banking, and monetary history together with the history of U.S. capitalism within a common explanatory framework, while offering a new perspective on the historical foundations of international financial integration.