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
Cornelius Vanderbilt: Frases em inglês
“Let them do what I have done.”
Often attributed, but without a contemporary source, as a remark on being asked to contribute to charity for the poor. See for example Commodore (2009) by Edward J. Renehan