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| Ashbourne | "Pitt: some Chapters of his Life and Times," by the Rt. Hon. Lord Ashbourne. 1898. |
| Auckland Journals | "The Journal and Corresp. of William, Lord Auckland." 4 vols. 1861. |
| Beaufort P. | MSS. of the Duke of Beaufort," etc. (Hist. MSS. Comm.). 1891. |
| B.M. Add. MSS. | Additional Manuscripts of the British Museum. |
| Buckingham P. | "Mems. of the Court and Cabinets of George III," by the Duke of Buckingham. 2 vols. 1853. |
| Campbell | "Lives of the Lord Chancellors," by Lord Campbell. 8 vols. 1845–69. |
| Castlereagh Corresp. | "Mems. and Corresp. of Viscount Castlereagh." 8 vols. 1848–53. |
| Chevening MSS. | Manuscripts of Earl Stanhope, preserved at Chevening. |
| Cunningham | "Growth of Eng. Industry and Commerce (Modern Times)," by Dr. W. Cunningham. 1892. |
| Dropmore P. | "The Manuscripts of J. B. Fortescue, Esq., preserved at Dropmore" (Hist. MSS. Comm.). 7 vols. 1892–1910. |
| Fortescue | "The History of the British Army," by the Hon. J. W. Fortescue. vol. iv. |
| Häusser | "Deutsche Geschichte (1786–1804)," by L. Häusser. 4 vols. 1861–3. |
| Holland | "Memoirs of the Whig Party," by Lord Holland. 2 vols. 1852. |
| Jesse | "Mems. of the Life and Reign of George III," by J. H. Jesse. 3 vols. 1867. |
| Lecky | "Hist. of England in the Eighteenth Century," by W. E. H. Lecky. 8 vols. Fifth edit. 1891–1904. |
| Malmesbury Diaries | "Diaries and Corresp. of the First Earl of Malmesbury." 4 vols. 1844. |
| Parl. Hist. | "History of the Parliamentary Debates" (after 1804 continued in Hansard). |
| Pellew | "Life and Corresp. of the first Viscount Sidmouth," by Rev. C. Pellew. 3 vols. 1847. |
| Pitt MSS. | Pitt MSS., preserved at H.M. Public Record Office. |
| Porritt | "The Unreformed House of Commons," by E. Porritt, 2 vols. 1909. |
| Pretyman MSS. | MSS. of E. G. Pretyman, Esq., M.P., preserved at Orwell Park. |
| Rose G., "Diaries" | "Diaries and Corresp. of Rt. Hon. G. Rose." 2 vols. 1860. |
| Rose, "Napoleon" | "Life of Napoleon," by J. H. Rose. 2 vols. 1909. |
| Rose, "Third Coalition" | "Select Despatches ... relating to the Formation of the Third Coalition (1804–5)," ed. by J. H. Rose (Royal Historical Soc., 1904). |
| Rutland P. | "MSS. of the Duke of Rutland" (Hist. MSS. Comm.). 3 vols. 1894. |
| Ruville | "William Pitt, Earl of Chatham," by A. von Ruville (Eng. transl.). 3 vols. 1907. |
| Sorel | "L'Europe et la Révolution française," par A. Sorel. Pts. II, III. 1889, 1897. |
| Stanhope | "Life of ... William Pitt," by Earl Stanhope. 4 vols. 3rd edition. 1867. |
| Sybel | "Geschichte der Revolutionzeit (1789–1800)," von H. von Sybel. Eng. translation. 4 vols. 1867–9. |
| Vivenot | "Quellen zur Geschichte der deutschen Kaiserpolitik Œsterreichs ..." von A. von Vivenot. 1873. |
| Wraxall | "Memoirs of Sir N. W. Wraxall" (1772–84), edited by H. B. Wheatley. 5 vols. 1884. |