Sir Arthur Conan Doyle

Sherlock Holmes and Dr. Watson receive a letter from an informant known by the pseudonym Fred Porlock. Porlock is part of Professor Moriarty's criminal organization. The letter is written in a numeric code, and Holmes decodes the letter, which warns that John Douglas of Birlstone House is about to be murdered.

The letters of my friend Mr. Stark Munro appear to me to form so connected a whole and to give so plain an account of some of the troubles which a young man may be called upon to face right away at the outset of his career that I have handed them over to the gentleman who is about to edit them.

The story of Professor Challenger, who leads a scientific expedition to the Amazonian rainforest. The Professor and his team stumble upon a lost world and struggle to escape danger from wild animals, ape-men and dinosaurs. The story is shortened, but aims to retain the flavour of the original.