The second volume of the Invincible Debating Society's minutes contains entries, arranged chronologically, from December 1906 through November 1915. These entries, which start on page 1 vary in length, usually include the date, a description of the meeting, updates on the Society's activities, and identify members who participated. The first section of this volume contains unnumbered pages that list the membership rolls for each academic year. Pages without content were not photographed. The Minutes of the Invincible Debating Society comprise 3 volumes, which are located at the National Archives and Records Administration, Record Group 75, Series 1339.
Two letters, which relate to the Society's fundraising for the Belgian Relief fund, were found within this volume at the U.S. National Archives.