Event materials include programs, menus, correspondence, minutes, photographs, membership pins, and membership lists. There is also material from the luncheon attended by President William McKinley in 1899 and the Commercial Club's visits to Panama. Included is an account by Robert Batcheller, who served as secretary, of his 1905 trip to Cuba as a guest of the Commercial Club of Chicago. The engraver's blocks include a group photo in front of "Colonel Torrer's house," a photo of the house, and photos from the McKinley luncheon publications.