Mr. Summerlee desired to know how it was that Professor Challenger claimed to have made discoveries in those regions which had been overlooked by Wallace, Bates, and other previous explorers of established scientific repute.

Professor Challenger answered that Mr. Summerlee appeared to be confusing the Amazon with the Thames; that it was in reality a somewhat larger river; that Mr. Summerlee might be interested to know that with the Orinoco, which communicated with it, some fifty thousand miles of country were opened up, and that in so vast a space it was not impossible for one person to find what another had missed.