Jack London in 1893
Jack London (1876-1916) was an American author in the late 19th century and early 20th century.
In 1893, he worked as a bellboy at the Hotel Brian in San Francisco. His earlier jobs included being an oyster pirate, selling newspapers and working in a fish factory. While working as a bellboy, he met Data who had been transported back in time. He helped Data, whom he believed to be an inventor, acquire things that he needed to build a device to detect temporal distortions to return to the 24th century.
He also tried to talk Samuel Clemens into writing Jack's biography, but Clemens advised him to become a writer himself and to fulfill his dream of going to Alaska. (TNG: "Time's Arrow", "Time's Arrow, Part II")
Jack London was played by actor Michael Aron.