The letters collected for this site are from microfilm and photocopies in the Queen's Disraeli Project collection. Most of the copies come from the Hughenden papers, but a variety of other sources were used, as well. The name of the source precedes the reference number of the individual letter, except in the case of the Hughenden papers, in which case only the reference number appears (e.g. rothschild 190; but A/1/E/71 [Hughenden]).

The following are the sources from which the letters of this site come:

Belvoir Castle - Belvoir Castle Archives, Lincolnshire (letters not individually referenced)

BLA - British Library Archives, London

Durham C.R.O. - Durham County Record Office, Durham

GMF - Guggenheim, John Simon, Memorial Foundation, New York

Hughenden Collection, Bodleian Library, Oxford

Reel 147 - Hughenden typed transcripts (letters not individually referenced)

rothschild - Rothschild Archives, London