Doyle, Arthur Conan: The Parasite. V1. 17 Jan 2011
 

Sir Arthur Ignatius Conan Doyle, DL (22 May 1859 – 7 July 1930) was a Scottish physician and writer, most noted for his stories about the detective Sherlock Holmes, which are generally considered a major innovation in the field of crime fiction, and for the adventures of Professor Challenger. He was a prolific writer whose other works include science fiction stories, historical novels, plays and romances, poetry, and non-fiction.

Excerpt
Charles Sadler must know something of this! His vague words of warning take a meaning now. Oh, if I had only listened to him then, before I helped by these repeated sittings to forge the links of the chain which binds me! But I will see him to-day.