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,
Earl of Mornington (1766 ship) Earl of Mornington (1766 ship) Earl of Mornington (or "Earl Mornington"), was a merchant vessel of 500 tons burthen (bm) built at Bombay Dockyard of teak and launched in 1766 or 1768. She made three voyages under charter to the British East India Company (EIC) under the command of captain Benjamin Ferguson. She does not appear in "Lloyd's Register" until 1804 and no longer appears in either "Lloyd's Register" or in the "Register of Shipping" in 1810. Her first voyage for the EIC took place between 20 November 1799 and 22 August 1802. On this voyage she sailed to Bengal.