More biographies have been written about banker J. Pierpont Morgan, than about some American presidents. Yet the man who J. Pierpont’s father relied upon to mentor his difficult but gifted son, Anthony J. Drexler, a man who “More than any other American in the 19th Century . . . altered the course of American finance,? according to a J. P. Morgan & Co. historian, has only one biography to his credit. This is not quite a rags-to-riches story. Anthony was not poor when he went into his father’s currency brokerage firm in Philadelphia; he was penniless. But he was only 13 at the time. His father, Francis, was an Austrian immigrant, and aspiring painter, who arrived in Philadelphia in 1817. It was the second largest city in America with a population of 60,000, and the third largest English-speaking city in the world.