[388] St. Helen (_d._ 328), first wife of Constantius I. Chlorus and mother of Constantine. Her husband repudiated her when he was created Emperor, to marry the daughter of Maximian. When Constantine became Emperor, he gave his mother the title of Empress, and she embraced Christianity with her son. St. Helen visited Jerusalem in 325, built a church on Mount Calvary, and discovered the remains of the True Cross in 326.--T. [389] Constantine I. the Great (274-337) became Emperor in 306 and embraced Christianity in 312.--T. [390] Baron Friedrich Heinrich Alexander von Humboldt (1769-1859), the Prussian explorer, author of several geographical works including the _Voyage aux régions équinoxiales du nouveau continent_ (Paris, 1799 _et seq._), from which the above extract is taken.--T. [391] Io mi volsi a man destra, e posi mente All'astro polo, e vidi quattro stelle Non viste mai fuor ch'alla prima gente. (_Il Purgatorio_, I. 22-24).--B. [392] St Napoleon (_fl._ 13th century), of Rome, canonized by Pope Pius VII. to be honoured on the 15th of August, the date of Napoleon Bonaparte's birthday in 1769.--T. [393] Admiral Sir George Cockburn (1772-1853) conveyed Bonaparte to St. Helena on board the _Northumberland_ and remained at St. Helena as Governor from October 1815 to the summer of 1816.--T. [394] M. Muiron (_d._ 1796).--B. [395] The French commissary was the Marquis de Montchenu; the Austrian, Baron von Stürmer; the Russian, the Comte de Balmaine.--B. [396] Jean Baptiste Isabey (1764-1855), a pupil of David, and a famous miniature painter. He was successively appointed first painter to the Sèvres Porcelain Manufactory, Court Painter to the Emperor and, later, to King Louis XVIII., Organizer of Court Festivities, and Assistant Keeper of the Royal Museums (1827). Isabey painted the portraits in miniature of all the principal persons in Europe, from Napoleon to Alexander.--T. [397] William Pitt second Lord, later first Earl Amherst (1773-1857) was sent, in 1816, as Ambassador to China, where he met with but small success. Lord Amherst was appointed Governor-General of India in 1823.--T. [398] Admiral Sir Pulteney Malcolm (1768-1838), Commander-in-Chief of the St. Helena Station in 1816 and 1817.--T. [399] Captain Basil Hall (1788-1844), author of a number of volumes of Voyages, the best-known of which was published in 1815, after his return from St. Helena, entitled, _An Account of a Voyage of Discovery to the West Coast of Corea and the great Loo-Choo Islands._--B. [400] The explosion, directed against Bonaparte while First Consul, took place on the 24th of December 1800, in the Rue Saint-Nicaise in Paris, a few moments after the Consul had passed by. Eight persons were killed and twenty-eight grievously wounded.--T.