This study comprises an examination of the financial, social and cultural ties between an inter-regional network of merchants and planters living in New York and the Lower Mississippi Valley. The Leverich brothers, originally of Newtown in Queens County, New York, worked as merchants in New York City and New Orleans, and counted many of the wealthiest planters of Mississippi and Louisiana as their clients. When Charles and Henry Leverich married Margaret and Matilda Gustine of Natchez, Mississippi, they added family ties to pre-existing financial and social ones. The Leverichs and their familial clients were united in a trans-regional network by shared business interests, friendships, culture and politics. The depth of these connections is demonstrated extensively in correspondence to and from the Leverichs and their various family members, as found in various archives including the New York Historical Society and Columbia University's Rare Book and Manuscript Library.

An examination of the Leverichs' trans-regional elite network is crucial to advancing historiographical understanding of the ways regional identities and origins informed (or did not inform) antebellum elites' actions and priorities. In the wake of extensive numbers of studies of antebellum politics and society that emphasize regional divisions, this examination of the Leverich network contributes to recent scholarship that utilises case studies to understand the ways in which southerners and northerners did interact, even in the midst of political tension, secession, and war. In the Leverichs' case, inter-regional contact went far beyond mere interaction, extending to ties of family and business, and comprising the bonds most significant to any antebellum elite. The case of the Leverich family's inter-regional network of elites demonstrates that, for those elites in the antebellum era, mutual interest was more significant than regional division in the creation of their financial and social associations.