American philanthropist and co-founder of Sunoco. TLS, one page, 7.25 x 10.5, personal letterhead, March 13, 1939. Letter declining an invitation to speak to the Engineers Club of Philadelphia. In part: “I find so much work has accumulated during my vacation that it will simply be impossible for me to take such a talk as you suggest this month.” In fine condition, with a few scattered light creases. RRAuction COA.
