The Fux family from Metlika held a hundred-years hereditary lease on the town’s post house, a relay station between Karlovac and Ljubljana. Between the end of the eighteenth century and the end of the nineteenth century, maintaining a successful and lucrative business made it one of the most distinguished middle-class families in Metlika and White Carniola. The family’s standing was further raised and fortified through equally successful strategies of forming marriage alliances, above all with the Croatian petty nobility along the Kolpa River. Studies of these interesting marriage ties shed light on the lively social mobility among White Carniolan bourgeoisie and the surrounding Croatian petty nobility as well as on the cultural-historical and cross-border social ties established during the period of national awakening.