Sir Arthur Conan Doyle in the context of "Journey to the Center of the Earth"

Clement Lindley Wragge (18 September 1852 – 10 December 1922) was an English meteorologist. He set up the Wragge Museum in Stafford following a trip around the world. He was a Fellow of the Royal Geographical Society and in 1879 was elected Fellow of the Royal Meteorological Society in London. To the end of his life, he was interested in theosophy and spiritualism. In 1908, during a tour of India, he met with Mirza Ghulam Ahmad of Qadian, the founder of the Ahmadiyya movement in Islam who had claimed to be the Mahdi, the messianic redeemer awaited by Muslims. Sir Arthur Conan Doyle sought him out in New Zealand to ask for his views on spiritualism before writing The Wanderings of a Spiritualist in 1921. After training in law, Wragge became a meteorologist, his accomplishments in the field including winning the Scottish Meteorological Society's Gold Medal and years later starting the trend of using people's names for cyclones. He travelled widely, giving lectures in London and India, and in his later years was an authority on Australia, India and the Pacific Islands.

Professor James Moriarty is a fictional character and criminal mastermind created by Sir Arthur Conan Doyle to be a formidable enemy for the author's fictional detective Sherlock Holmes. He was created primarily as a device by which Doyle could kill Holmes and end the hero's stories. Professor Moriarty first appears in the short story "The Adventure of the Final Problem", first published in The Strand Magazine in December 1893. He also plays a role in the final Sherlock Holmes novel The Valley of Fear, but without a direct appearance. Holmes mentions Moriarty in five other stories: "The Adventure of the Empty House", "The Adventure of the Norwood Builder", "The Adventure of the Missing Three-Quarter", "The Adventure of the Illustrious Client", and "His Last Bow".

Moriarty is an international criminal gang leader who uses his intelligence and resources to provide criminals with crime strategies and sometimes protection from the law, all in exchange for a fee or a cut of profit. Holmes likens Moriarty to a spider at the centre of a web and calls him the "Napoleon of crime", a phrase Doyle lifted from a Scotland Yard inspector referring to Adam Worth, a real-life criminal mastermind and one of the individuals upon whom the character of Moriarty was based. Despite appearing only twice in Doyle's original stories, later adaptations and pastiches have given Moriarty greater prominence, often using him as the main antagonist, and treated him as Sherlock Holmes' archenemy.

Traditionally, the canon of Sherlock Holmes consists of the 56 short stories and four novels written by Sir Arthur Conan Doyle. In this context, the term "canon" is an attempt to distinguish between Doyle's original works and subsequent works by other authors using the same characters.

Usually capitalised by fans of the Sherlockian game as "the Canon", the description of these 60 adventures as the Sherlock Holmes canon and the game of applying the methods of "Higher Criticism" to it was started by Ronald Knox as a playful use of the traditional definition of "canon" as an authoritative list of books accepted as holy scripture.

Meiringen (Swiss Standard German pronunciation: [ˈmaɪrɪŋən]) is a municipality in the Interlaken-Oberhasli administrative district in the canton of Bern in Switzerland. Besides the village of Meiringen, the municipality includes the settlements of Balm, Brünigen, Eisenbolgen, Hausen, Prasti, Sand, Stein, Unterbach, Unterheidon, Wylerli and Zaun. The municipal coat of arms shows a black eagle in a yellow field. ("Or an Eagle displayed Sable crowned, beaked, langued and membered of the first.")Formerly the coat of arms of the entire Oberhasli Talschaft, this design continues the imperial coat of arms.

Meiringen is famous for the nearby Reichenbach Falls, a waterfall that was the setting for the final showdown between Sir Arthur Conan Doyle's fictional detective Sherlock Holmes and his nemesis Professor Moriarty. The village is also known for its claim to have been the place where meringue was first created.

Tarō Hirai (平井 太郎, Hirai Tarō; October 21, 1894 – July 28, 1965), better known by the pen name Edogawa Ranpo or Edogawa Rampo (江戸川 乱歩), was a Japanese author and critic who played a major role in the development of Japanese mystery and thriller fiction. Many of his novels involve the detective hero Kogoro Akechi, who in later books was the leader of a group of boy detectives known as the "Boy Detectives Club" (少年探偵団, Shōnen tantei dan).

Ranpo was an admirer of Western mystery writers, and especially of Edgar Allan Poe. His pen name is a rendering of Poe's name. Other authors who were special influences on him were Sir Arthur Conan Doyle, whom he attempted to translate into Japanese during his days as a student at Waseda University, and the Japanese mystery writer Ruikō Kuroiwa.