In the first half of the nineteenth century, transatlantic trade and finance networks were complex webs of transactions often consisting of lengthy chains of connections linking distant firms to distant markets. As a number of scholars have shown, merchant bankers of the nineteenth century were at the centre of many of these networks, acting as an inter-connected and often impenetrable group, which dictated the flow of capital and investment across many borders. Most recently, scholars such as Manuel Llorca-Jaña, Lopez-Morell and Juliette Levy (to name a few) have produced a number of especially significant publications on the role of financial intermediaries in Latin America. Llorca-Jaña and Lopez-Morrell's work has been essential for illuminating the role of London bankers Huth & Co. and Rothschilds (respectively) in creating a global network which included Latin American markets and trades; while Levy's work has highlighted the role of special financial players in inland markets, namely in the Yucatan. This paper aims to build on this previous work through an analysis of crucial network actors in Anglo-American merchant bank networks in the first half of the nineteenth century. To conduct a varied and general analysis, this paper will draw on the correspondence records of the Baring Brothers and N. M. Rothschilds, two of the most well-known and profitable London merchant banks of the period. Through this material, this study will present an analysis of British merchant-bank connectivity and the role of intermediaries in connecting merchant banks to distant markets and clients, such as the mining districts of interior Mexico and the sugar merchants of Cuba.In the mid-eighteenth century, the Beekman family firm of New York, importers of dry goods from England and with numerous ties to the Caribbean, were at the centre of a growing transatlantic trading community. It was around this time that a prominent member of the family, William Beekman, a ships-captain, settled in Liverpool with the view to strengthening the firms business on that side of the Atlantic. 1 This was achieved through meetings with manufacturers, building contacts in the local merchant community and relaying important information on this market back to the New York firm. The Beekmans were not the only firms sending individuals abroad to access markets, other firms such as Greg, Cunningham & Co. also sought to do the same by spreading firm partners or agents between Belfast, Liverpool and New York. 2 As trade and subsequently finance of international trade grew to become even more complex, firms that could afford to do so (and had the right personnel available) sent multiple individuals abroad to learn about new markets, network-build, coordinate firm activities and act as a conduit for information for the focal firm. Often referred to as agents, special resident agents, brokers and middle-men, these individuals provided the crucial service of intermediation for firms engaging in long-distance trade and finance (these individuals will be referred...