Letters to William Ormsby-Gore, 1800-1858, from Gore and Ormsby-Gore family members, estate owners, politicians and business men. The subject matter reflects the recipient 's public role in the local government of Shropshire and the Caernarfonshire boroughs, in addition to his responsibilities as a private landowner in Wales, England and Ireland. Topics include civic matters relating to Criccieth, namely the constableship of Criccieth Castle and the hereditary mayoralty, building developments on corporation land and the position of Criccieth as a contributory borough under the Reform Bill, 1831-1832; fundraising for the restoration of public buildings and churches in Shropshire and Ireland; administration of charities and schools at Oswestry, Deuddwr and Sligo, 1838-1842; establishment of the Shrewsbury and Hereford Railway Company, lines to Dublin and North Wales, 1843, and the Festiniog Railway Company, 1851; political representation and elections in Ireland and Caernarfonshire; social conditions in Ireland; the Poor Law Amendment Bill, [1834]; the Corn Laws, 1840-1842; an act to unite the dioceses of Bangor and St Asaph, 1843; the Crimean War, 1854-1855; formation of the Genealogical Society, 1853-1854; and the army careers of his sons. There are also drafts and copies of outgoing correspondence, 1831-1857.

Letters to William Richard Ormsby-Gore, second Lord Harlech, 1833-1902, from family members, public figures, military colleagues, solicitors, bankers and academic researchers. The subject matter strongly reflects Victorian Britain, on the themes of W.R.O.G. 's military career with the 13th Light Dragoons, 1841-1855; his political career in Ireland, 1841-1874; the public school education of his sons; the Crimean War, 1854-1855; the British campaign in Egypt, 1882; regimental life in colonial India, 1892-1899; Conservative and Unionist politics; game laws and blood sports. Many of the letters concern Ireland and Gladstone 's policies on government purchase of the railways, 1869-1873, Catholic and Protestant tensions, 1875-1876, violence linked to the land question and evictions of tenants, 1876-1887. Other points of interest are: the history of the parish of Selatyn; the headship of Deuddwr school, 1880, 1889; publication of the Gwalia newspaper, 1886-1887; erection of a memorial to Bishop John Owen in St Asaph Cathedral, 1898; and the peerage of John Ralph Ormsby-Gore, 1875; the series includes some drafts and copies of outgoing correspondence.

Original and typescript copies of letters to John Ralph Ormsby-Gore, first Baron Harlech, his wife Sarah and other members of his family, 1832-1875. Correspondents include Montagu Corry, Benjamin Disraeli and William Watkin Edward Wynne, on the creation of the Barony of Harlech, 1875; John Wilson Croker, 1832, William Ormsby-Gore, 1837, Lord Hill, 1853, George Francis Seymour and others on the Boundary Bill, 1832, political representation in Shropshire and Ireland, freedom of public worship, 1862, solicitation of his support for career advancement, personal responsiblities and political support for him among the tradespeople of Oswestry, 1874.

Over one hundred and thirty letters, [?1831]-[c. 1860], from Henry Petty-Fitzmaurice, third marquis of Lansdowne, to Nassau William Senior, mainly discussing parliamentary business and contemporary political issues, including Ireland and poor law administration, often with reference to Senior's own writings.

Twenty-eight letters, 1832-1859, from Nassau Senior to Lord Lansdowne as President of the Cabinet Council, some discussing contemporary political issues including Poor Law administration, Ireland and the economy. Others are written from Paris, Athens and various German towns and refer to the political situation and social conditions in these respective countries.
Also included are two letters, 1835-1836, from Alexis de Tocqueville to Lord Lansdowne, together with transcripts of four letters, 1848-1855, from de Tocqueville to Nassau Senior; one letter, 1848, from George Sumner to Nassau Senior discussing the 1848 revolution in France; and other related letters.