• On Oct. 18, 1767, Charles Mason and Jeremiah Dixon complete their survey of the boundary between the colonies of Pennsylvania and Maryland, as well as areas that would become Delaware and West Virginia. The Mason-Dixon Line created the boundary at a northern latitude of 39 degrees and 43 minutes.
• On Oct. 15, 1863, the C.S.S. Hunley, which would become the world’s first successful combat submarine, sinks during a test run, killing its inventor and seven crewmembers. The Hunley was operated by a crew of eight — one man steered while the other seven turned a crank that drove the ship’s propeller.
• On Oct. 14, 1892, “The Adventures of Sherlock Holmes,” by Arthur Conan Doyle, is published. The book was the first collection of Holmes stories, which Conan Doyle had been publishing in magazines since 1887.
• On Oct. 16, 1923, Walt Disney and his brother Roy found the Disney Brothers Cartoon Studio in Hollywood, California. With the 1928 release of “Steamboat Willie,” the world was introduced to Mickey Mouse.
• On Oct. 17, 1968, American Olympic gold medalist Tommie Smith and bronze medalist John Carlos are forced to return their awards because they raised their fists in a black-power salute during the medal ceremony in Mexico City.
• On Oct. 13, 1975, Charlie Rich stood at the Country Music Association of America show to announce the Entertainer of the Year — and set fire to the envelope after he saw that John Denver was the winner. It was later said that Rich was on prescription pain medication and gin-and-tonics that night.
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