In 1885, at the age of seventy-two and "in the evening of life," Thomas Mellon published his autobiography in a limited edition exclusively for his family. He was a distinguished and highly successful Pittsburgh entrepreneur, judge, and banker, and his descendants would play major roles in American business, art, and philanthropy. Two of his sons, Andrew William and Richard Beatty, were to join Henry Ford and John D. Rockefeller as the four wealthiest...