I had a vague recollection of having heard my friend Edward Malone, of the Gazette, speak of Professor Challenger, with whom he had been associated in some remarkable adventures. I am so busy, however, with my own profession, and my firm has been so overtaxed with orders, that I know little of what is going on in the world outside my own special interests. My general recollection was that Challenger has been depicted as a wild genius of a violent and intolerant disposition.