November 28 & 29, 1884 Academy of Music  

February 27, 1885 Oratorio Hall (Unknown location) 

Twain interviewed 28 November 1884  "Mark Twain's Ideas: A Talk with the Humorist" Baltimore American, 29 November 1884, Included in "Mark Twain: The Complete Interviews" by Gary Scharnhorst (#23)