Earl of Londonderry extinct on the death of his great-grandson, the fourth Earl, in 1714. The second creation came in 1726 in favour of the soldier and politician Thomas Pitt, 1st Baron Londonderry. He had already been created Baron Londonderry in 1719 and was made Viscount Gallen-Ridgeway at the same time as he was granted the earldom, also in the Peerage of Ireland. He was the husband of Lady Frances Ridgeway, daughter and heiress of the fourth Earl of the first creation. A member of the prominent Pitt family, he was the uncle of William Pitt, 1st Earl of Chatham. His younger son,
William Pitt, 1st Earl of Chatham the observance of the Treaty of Paris by France and Spain, tension between American colonists and the mother country, and the status of the East India Company. Chatham set about his duties with tempestuous energy. One of the new ministry's earliest acts was to lay an embargo upon corn, which was thought necessary in order to prevent a dearth resulting from the unprecedented bad harvest of 1766. The measure was strongly opposed, and Lord Chatham delivered his first speech in the House of Lords in support of it. It proved to be almost the only measure introduced by his government