Michael Yogg wrote a book about Paul Cabot called "Passion for Reality", and recently did an interview with the Manual of Ideas. In the interview, he discusses what you can learn from Paul Cabot's investment approach.
Paul Cabot started the first mutual fund companies in the 1920's and he also lobbied for key New Deal securities legislation in the 1930's. Michael Yogg worked for nearly two decades for Paul Cabot's mutual fund company, State Steel Investment Corporation. In the book, he shares the secrets to Paul Cabot's success.