This is biographical book. For my general material I have been largely indebted to Miss Browning. Her memory was the only existing record of her brother's boyhood and youth. It has been to me an unfailing as well as always accessible authority for that subsequent period of his life which I could only know in disconnected facts or his own fragmentary reminiscences. It is less true, indeed, to say that she has greatly helped me in writing this short biography than that without her help it could never have been undertaken.
