MacNeil’s daughter, Deirdre, donated the collection to The Center following its use by Richard A. Baker, Historian Emeritus of the U.S. Senate, who consulted the collection to complete a manuscript on the history of the Senate begun by MacNeil. Baker packed and shipped the records to The Center in August 2012.
Upon arrival, the collection was only loosely organized by subject. Baker compiled a box list based on MacNeil’s “organizational” scheme, and that list has been preserved in the collection file. The subject headings were often inaccurate or misleading, however, and the decision was made to reorganize the collection.