American entrepreneur (1839–1937) who entered the oil industry at the age of twenty-four and worked ruthlessly to unify his business interests into the powerful Standard Oil Trust. Distinguished matte-finish 5.5 x 7.75 half-length photo of a seated Rockefeller, copyright 1905, signed in blue pencil in the blank lower margin. The photographer, Edmondson, has also signed in pencil beneath the image. Housed in its original presentation folder. Subtle toning and a few tiny marks to margin, otherwise fine condition. Auction LOA John Reznikoff/PSA/DNA and R&R COA.