Comprised of biographical material (including a large selection of diaries), material related to Butterfield's work at Guy's Hospital London, extensive documentation of Butterfield's period working at Cambridge University, a record of Butterfield's lectures and visits, and his work for conferences, material related to Butterfield's publications, documentation of Butterfield's substantial involvement in societies and organiations, material related to Butterfield's engagement with the House of Lords, and a substantial selection of Butterfield's correspondence.