Heraclius was an able and sensitive man—very sensitive, very much in the grip of his own moods. Sometimes he appears as a hero, a great administrator; sometimes as an apathetic recluse. He won his empire (610) by the sword; then the reaction came and he allowed the Persians to occupy Syria and Egypt almost without striking a blow. Alexandria fell by treachery. She was safe on the seaward side, for the Persians had no fleet, and her immense walls made her impregnable by land; their army (which was encamped near Mex) could burn monasteries but do nothing more. But a foreign student—Peter was his name—got into touch with them and revealed the secrets of her topography. A canal ran through her from the Western Harbour, rather to the north of the present (Mahmoudieh) canal, and it passed, by a bridge, under the Canopic Way (present Rue Sidi Metwalli). The harbour end of the Canal was unguarded, and a few Persians, at Peter’s advice, disguised themselves as fishermen and rowed in; then walked westward down the Canopic Way and unbarred the Gate of the Moon to the main army (617). Their rule was not cruel; though sun-worshippers, they persecuted neither orthodox Christians nor Copts. For five years Heraclius did nothing; then shook off his torpor and performed miracles. Marching against the armies of the Persians in Asia, he defeated them and recovered the relic of the True Cross, which they had taken from Jerusalem. Alexandria and Egypt were freed, and at the festival of the Exaltation of the Cross—his coins commemorate it—the Emperor appeared as the champion of Christendom and the greatest ruler in the world. It is unlikely that in the hour of his triumph he paid any attention to the envoys of an obscure Arab Sheikh named Mohammed, who came to congratulate him on his victory and to suggest that he should adopt a new religion called “Peace” or “Islam.” But he is said to have dismissed them politely. The same Sheikh also sent envoys to the Imperial viceroy at Alexandria. He too was polite and sent back a present that included an ass, a mule, a bag of money, some butter and honey, and two Coptic maidens. One of the latter, Mary, became the Sheikh’s favourite concubine. Amidst such amenities did our intercourse with Mohammedanism begin.