The focus of this volume is on the development of central banking in the US under the National Banking System (NBS) from 1863 until the creation of the Federal Reserve half a century later. The NBS was important because it created a long-lasting Federal bank chartering and regulating agency, the Office of the Comptroller of the Currency (OCC), and also pioneered the backing of paper currency by Federal government debt as a means to provide a common currency throughout the country that would exchange at its par value. At the same time, the private sector creation of clearing houses was allowed to flourish in order to improve the efficiency of clearing bank drafts and cheques and to aid in periods of panic and financial crisis.