University of Newcastle upon Tyne, Robinson Library
National Library of Ireland, Dublin
National Archives of the United Kingdom, Public Record Office, London
National Archives of Canada, Ottawa
Cambridge University Library
Churchill College, Churchill Archives Centre, Cambridge
English Historical Review
Boston Public Library, Massachusetts
National Portrait Gallery, London
National Library of Scotland, Edinburgh
W. E.
GladstoneThe Gladstone diaries
: with cabinet minutes and prime-ministerial correspondence, ed. M. R. D.
Foot & H. C. G.
Matthew, 14 vols.
(1968–94)
Cumbria Archive Service, Carlisle
John Rylands University Library of Manchester
Proceedings of the British Academy
British Library, London
Yale University, Sterling Memorial Library
J. O.
Baylen & N. J.
Gossman, eds., Biographical dictionary of modern British radicals, 3 vols. in 4
(1979–88)
University of Birmingham Library
University of St Andrews Library
private collection
Dr Williams's Library, London
King's College, Cambridge
Trinity College, Dublin
British Film Institute, London, National Archive
National Library of Australia
Parliamentary Archives of the United Kingdom
Scottish National Portrait Gallery, Edinburgh
National Archives of Scotland, Edinburgh
Bodleian Library, Oxford
University College, London
Wellcome Library for the History and Understanding of Medicine, London