He had two sons, Robert and Thomas. Robert Pitt who succeeded him at Boconnoc, married Harriet Villiers, third sister of John Earl Grandison. He died in May 1727, leaving two sons, Thomas Pitt, and William, afterwards Earl of Chatham. Thomas Pitt, his brother, was created Earl of Londonderry, in consequence of his marrying the heiress of Ridgeway, who had borne that distinction; this younger branch became extinct in 1764. Thomas Pitt, his son, engaged most extensively in the political speculation, for which Cornwall was then become an ample field. But, having supported the party of Frederick Prince of Wales, he failed of obtaining any of the objects to which most speculations are supposed to lead. He married Christiana, sister of George first Lord Lyttelton; by whom he left Thomas Pitt, who, on the elevation of his first cousin, William Pitt, to the chief office in the State, when under twenty-five years of age, was created Baron Camelford in Jan. 1784. He died in 1793, leaving a son Thomas Pitt, the second and last Lord Camelford, and a daughter married to William Wyndham Grenville, Lord Grenville, the present pos-
For these 433 grains of diamond, the Regent Duke of Orleans is stated to have given 135,000l, or two thousand eight hundred and eighty-nine pounds troy of standard gold, or nearly one ton one hundred and a quarter avoirdupoise; above thirty-eight thousand four hundred times its own weight, or seven thousand five hundred and eighty times its bulk.
The Regent and his two successors in the government of France, used this diamond as an ornament to their hats on occasions of state. It was stolen during the license of the great Revolution, but recovered.
Napoleon had it placed between the teeth of a crocodile, forming the handle of his sword, unaware perhaps of how much this gem had contributed towards raising up the most formidable opponent to his ambition and ultimate aggrandisement.