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St. Louis is a city in the United States, located in the state of Missouri. Meriwether Lewis and William Clark, explorers and agents of the Tomas branch of the Cahill family, returned to St. Louis in 1806 after exploring the western United States in search of Clues.
In 1904, the city was chosen the location of the Summer Olympics by Tomas leaders, meaning the branch believed there was a hidden Clue or other notable Cahill activity in or around the city. It is currently unknown if the Tomas branch continues to operate in the city.