September 29, 1890
September 29 or August 23-28 – Sam spoke at the National Wholesale Druggists Association Banquet, Washington, D.C. Fatout reports this as questionably September [MT Speaking 261-2]. Sam may have gone to Washington sometime between Sept. 29 and 30; he was there on Oct. 1. This would leave only a day or two in September for such a speech, but six possible days in August.