“Gentlemen,
You have undertaken to cheat me. I won't sue you, for law is too slow. I'll ruin you.
Yours truly,
Cornelius Vanderbilt”

— Cornelius Vanderbilt

Said to be the entirety of a letter to Charles Morgan and C. K. Garrison, quoted in an obituary, "Commodore Vanderbilt's Life" (5 January 1877) New York Times. Stiles, in The First Tycoon (2009) doubts this. He notes that there is no earlier source, that Vanderbilt was no stranger to the courts, and that he never otherwise closed letters with "yours truly."
Disputed

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Cornelius Vanderbilt2

American businessman, philanthropist, and tycoon 1794–1877

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