Mezes' correspondence and documents relating to the Inquiry group. Correspondents include Emily Greene Balch, George Louis Beer, Isaiah Bowman, Wilbur Cross, Cleveland H. Dodge, Stephen P. Duggan, Edward A. Filene, Glenn Frank, Robert Herrick, Robert Lansing, Edward M. House, Samuel McCune Lindsay, Walter Lippmann, Breckenridge Long, Adolph C. Miller, William Phillips, Frank L. Polk, Albert Shaw, James T. Shotwell, Vladimir G. Simkhovitch, Frank William Taussig, Allyn A. Young.