Lord John Roxton has some points in common with Professor Summerlee, and others in which they are the very antithesis to each other. He is twenty years younger, but has something of the same spare, scraggy physique. As to his appearance, I have, as I recollect, described it in that portion of my narrative which I have left behind me in London. He is exceedingly neat and prim in his ways, dresses always with great care in white drill suits and high brown mosquito-boots, and shaves at least once a day. Like most men of action, he is laconic in speech, and sinks readily into his own thoughts, but he is always quick to answer a question or join in a conversation, talking in a queer, jerky, half-humorous fashion. His knowledge of the world, and very especially of South America, is surprising, and he has a wholehearted belief in the possibilities of our journey which is not to be dashed by the sneers of Professor Summerlee. He has a gentle voice and a quiet manner, but behind his twinkling blue eyes there lurks a capacity for furious wrath and implacable resolution, the more dangerous because they are held in leash.