Brad Snelling used many resources for his research into Rachmaninoff's performance in Duluth. One of these sources was Robin S. Gehl's dissertation, Reassessing a Legacy: Rachmaninoff in America, 1918-43. According to Gehl, Rachmaninoff had a contract with promoter Charles A. Ellis, specifying that he was to receive 50 percent of ticket sales over $1,000. The Duluth News Tribune reported on Jan. 21, 1920, that 3,500 people attended the recital. Rachmaninoff earned $1,875 for this performance and the one immediately following in Milwaukee, Wisconsin.