The terminal dates of this study are the year of the foundation of the Crédit Lyonnais and the year of the transfer of the management from Lyons to Paris. Until 1882, the siège social remained in the south, though from the late 1860's on, the initiative in the larger financial operations lay with the “succursale” in the capital. To satisfy the requirements of what Bouvier calls a two-headed direction, an extensive, daily correspondence was indispensable. The result is one of the richest banking archives ever opened to an inquiring researcher. It is not only their abundance that makes these records of the Crédit Lyonnais so valuable; it is their quality, the subjects they treat, the insights they give into the problems and minds of the directors of the bank. These papers deal with matters that today would be confined to conversation—directly or over that bane of the future researcher, the telephone; they concern not only decisions, but the reasons for decisions and the debates that lay behind them. Even if such thoughts were consigned to paper today, the records would in all likelihood end by being removed from the premises as the personal property of their authors. Given the catholicity of interests of the Credit Lyonnais—its activity in the regional and national economy, its innovations in French banking practice, its wide excursions into the field of international finance—its archives are a broad gateway into the economic history of the late nineteenth century.