He witnessed the overthrow of the Janissaries by Sultan Mahmoud II., and had his own experience of Turkish atrocities in the massacre which followed. He took a prominent part in the creation of the modern kingdom of Greece, and resigned his appointment in 1828, because of a conflict of opinion with Lord Aberdeen in the early stages of that movement. Afterwards, he was gazetted Ambassador to St. Petersburg; but the Emperor Nicholas, who by this time recognised the masterful qualities of the man, refused to receive him--a conspicuous slight, which Lord Stratford, who was as proud and irascible as the Czar, never forgave. Between the years 1842 and 1858 he again filled his old position as Ambassador to Constantinople, and during those years he won a unique ascendency--unmatched in the history of diplomacy--over men and movements in Turkey. He brought about many reforms, and made it his special concern to watch over the interests of the Christian subjects at the Porte, who styled him the 'Padishah of the Shah,' and that title--Sultan of the Sultan--exactly hit off the authority which he wielded, not always wisely, but always with good intent. It was an unfortunate circumstance that Lord Stratford, after his resignation in 1852, should have been summoned back for a further spell of six years' tenure of power exactly at the moment when Nicholas, prompted by the knowledge of the absence from Constantinople of the man who had held him in check, and of the accession to power in Downing Street of a statesman of mild temper and friendly disposition to Russia, was beginning once more to push his claims in the East. Lord Stratford had many virtues, but he had also a violent and uncertain temper. He was a man of inflexible integrity, iron will, undeniable moral courage, and commanding force of character. Yet, for a great Ambassador, he was at times strangely undiplomatic, whilst the keenness of his political judgment and forecasts sometimes suffered eclipse through the strength of his personal antipathies. [Sidenote: FAREWELL TO THE FOREIGN OFFICE]