But there were other notable spots in the neighborhood of the oasis. There farther to the north was the rock whence Moses had struck the water; there higher up, and more to the south-east, was the hill, where the Lord had spoken to the law-giver face to face, and where he had seen the burning bush; there again was the spring where he had met the daughters of Jethro, Zippora and Ledja, so called in the legend. Pious pilgrims came to these holy places in great numbers, and among them many natives of the peninsula, particularly Nabateans, who had previously visited the holy mountain in order to sacrifice on its summit to their gods, the sun, moon, and planets. At the outlet, towards the north, stood a castle, which ever since the Syrian Prefect, Cornelius Palma, had subdued Arabia Petraea in the time of Trajan, had been held by a Roman garrison for the protection of the blooming city of the desert against the incursions of the marauding Saracens and Blemmyes. But the citizens of Pharan themselves had taken measures for the security of their property. On the topmost cliffs of the jagged crown of the giant mountain--the most favorable spots for a look-out far and wide-- they placed sentinels, who day and night scanned the distance, so as to give a warning-signal in case of approaching clanger. Each house resembled a citadel, for it was built of strong masonry, and the younger men were all well exercised bowmen. The more distinguished families dwelt near the church-hill, and there too stood the houses of the Bishop Agapitus, and of the city councillors of Pharan. Among these the Senator Petrus enjoyed the greatest respect, partly by reason of his solid abilities, and of his possessions in quarries, garden-ground, date palms, and cattle; partly in consequence of the rare qualities of his wife, the deaconess Dorothea, the granddaughter of the long-deceased and venerable Bishop Chaeremon, who had fled hither with his wife during the persecution of the Christians under Decius, and who had converted many of the Pharanites to the knowledge of the Redeemer. The house of Petrus was of strong and well-joined stone, and the palm garden adjoining was carefully tended. Twenty slaves, many camels, and even two horses belonged to him, and the centurion in command of the Imperial garrison, the Gaul Phoebicius, and his wife Sirona, lived as lodgers under his roof; not quite to the satisfaction of the councillor, for the centurion was no Christian, but a worshipper of Mithras, in whose mysteries the wild Gaul had risen to the grade of a 'Lion,' whence his people, and with them the Pharanites in general, were wont to speak of him as "the Lion." His predecessor had been an officer of much lower rank but a believing Christian, whom Petrus had himself requested to live in his house, and when, about a year since, the Lion Phoebicius had taken the place of the pious Pankratius, the senator could not refuse him the quarters, which had become a right.