Cowper married Lady Henrietta, younger daughter of Henry de Nassau d'Auverquerque, 1st Earl of Grantham, a relative of the Dutch House of Orange-Nassau, and a count of the Holy Roman Empire.
Much of the land to build the station was purchased from local landowner George Augustus 6th Earl Cowper, who built the Cowper Arms Hotel on land adjoining to the west.
James Earl Jones | Prince Edward, Earl of Wessex | Louis Mountbatten, 1st Earl Mountbatten of Burma | Herbert Kitchener, 1st Earl Kitchener | Earl | Frederick Roberts, 1st Earl Roberts | Earl of Derby | Earl Warren | Earl of Pembroke | Robert Harley, 1st Earl of Oxford and Earl Mortimer | Earl of Warwick | Thomas Wentworth, 1st Earl of Strafford | Edward Smith-Stanley, 14th Earl of Derby | Earl of Shrewsbury | William Pitt, 1st Earl of Chatham | William Cowper | Simon de Montfort, 6th Earl of Leicester | Richard Neville, 16th Earl of Warwick | Earl of Leicester | John Scott, 1st Earl of Eldon | Robert Devereux, 2nd Earl of Essex | Robert, 1st Earl of Gloucester | Edward Harley, 2nd Earl of Oxford and Earl Mortimer | Earl of Devon | Douglas Haig, 1st Earl Haig | My Name Is Earl | Edward Hyde, 1st Earl of Clarendon | Earl Scruggs | Earl of March | Richard Howe, 1st Earl Howe |
It was entirely in character that on her deathbed she urged her daughter Emily to be faithful, not to her husband, Lord Cowper but to her lover, Lord Palmerston ( Emily and Palmerston eventually married after Cowper's death).
Subscribers included Professor T. R. Malthus, Baron Dimsdale and Earl Cowper, By 1835, the financial crisis had limited the number of in-patient beds to 10, but during the following years this number was increased.
In Whig Society, 1775–1818 (1921) and Lady Palmerston and her Times (1922) were based on the papers of her great-grandmother, Emily (the wife of Peter Cowper, 5th Earl Cowper, and later of Prime Minister Henry Temple, 3rd Viscount Palmerston) and With the Guards We Shall Go (1933), which detailed her great-uncle, John Jocelyn, 5th Earl of Roden, through the Crimean War.