American entrepreneur (1839–1937) who entered the oil industry at the age of twenty-four and worked ruthlessly to unify it into the powerful Standard Oil Trust. TLS, signed with his elderly “John D. Rockefeller,” one page, 5.75 x 7.75, personal letterhead, May 29, 1928. Rockefeller writes to Mrs. H. E. Whyte. In full: “I am sending you a little check, as a wedding gift, rather than risk duplicating something you may already have, and feeling that you would prefer to make your own selection. Please accept this with my best wishes for you and the fortunate Mr. Whyte, with the hope that you may have long and happy lives together.” In fine condition. LOA John Reznikoff/PSA/DNA and R&R COA.