Correspondence with the officers of the League, Clarence G. Hoag, George H. Hallett, Jr., their secretary Miss Elsie S. Parker, and the Field Secretary Walter J. Millard. Correspondence also includes material to and from Proportional Representation Societies in other countries, the largest of which is in Great Britain. Also, research materials concerning early advocates of proportional representation; and correspondence, manuscripts, documents, reports, charts, clippings, and printed materials kept by Richard Spencer Childs.