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,
John Pitt, 2nd Earl of Chatham It was around this time that he earned his nickname of 'the late Lord Chatham' due to his unpunctuality. Chatham nevertheless hung onto his office until the following December, when Pitt finally responded to pressure and moved his brother to the less responsible post of Lord Privy Seal. Two years later Chatham was promoted to Lord President of the Council. Here he stayed, remaining in office after Pitt's resignation under Henry Addington, until a cabinet reshuffle in June 1801 moved him to the post of Master-General of the Ordnance. He continued in this post until May 1810, with only a