I have said before that Lord John Roxton was a South Americomaniac. He could not speak of that great country without ardor, and this ardor was infectious, for, ignorant as I was, he fixed my attention and stimulated my curiosity. How I wish I could reproduce the glamour of his discourses, the peculiar mixture of accurate knowledge and of racy imagination which gave them their fascination, until even the Professor’s cynical and sceptical smile would gradually vanish from his thin face as he listened. He would tell the history of the mighty river so rapidly explored (for some of the first conquerors of Peru actually crossed the entire continent upon its waters), and yet so unknown in regard to all that lay behind its ever-changing banks.