books.google.co.za - Charles Darwin's health improved substantially in 1866 under a dietary and exercise regime prescribed by his physician Henry Bence Jones. With renewed vigour, he worked steadily on his manuscript of Variation of Plants and Animals under Domestication, submitting all but the final chapter to his publisher...http://books.google.co.za/books/about/The_Correspondence_of_Charles_Darwin.html?id=jTON1MPaa6IC&utm_source=gb-gplus-shareThe Correspondence of Charles Darwin:
