Melbourne Hall second Lord Melbourne, Queen Victoria's Prime Minister, was separated from his wife, Lady Caroline Lamb, in 1825, when her liaison with Lord Byron had become notorious. The house passed into the hands of the Cowper family when Emily Lamb, sister of the childless third and last Viscount Melbourne, married the 5th Earl Cowper. (She later married another Prime Minister, Lord Palmerston.) It remained in the Cowper family until Lady Amabel Cowper married Admiral of the Fleet Lord Walter Kerr who made Melbourne the family home in 1906. The current owner Lord Ralph Kerr also owns Ferniehirst Castle in Scotland. He
Peniston Lamb, 1st Viscount Melbourne of Cavan, but as it was an Irish peerage he was allowed to remain in the House of Commons. He was returned unopposed again as MP for Ludgershall at the elections in 1774 and 1780. In 1781 he was created Viscount Melbourne, of Kilmore in the County of Cavan, also in the Peerage of Ireland. He was appointed Gentleman of the Bedchamber to the Prince of Wales in 1783 and held the position until 1796. At the 1784 general election he stood for Malmesbury and was again returned unopposed. He switched again in 1790 and was returned unopposed at Newport,