When the effects of commerce required a situation better suited than Kerek to the collected population and increased opulence of the Nabataei, the appellation of Petra was transferred to the new city at Wady Mousa, which place had before been known to the [p.x]Greeks by the name of Arce [Greek text], a corruption perhaps of the Hebrew Rekem.[Joseph. Antiq. Jud. l.4,c.4.] To Wady Mousa, although of a very different aspect from Kerek, the name Petra was equally well adapted; and Kerek then became distinguished among the Greeks by its indigenous name, in the Greek form of Charax, to which the Romans added that of Omanorum, or Kerek of Ammon,[Plin. Hist. Nat. l.6,c.28.] to distinguish it from another Kerek, now called Kerek el Shobak. The former Kerek was afterwards restored by the Christians to the Jewish division of Moab, to which, being south of the river Arnon, it strictly belonged, and it was then called in Greek Charagmoba, under which name we find it mentioned as one of the cities and episcopal dioceses of the third Palestine.[Hierocl. Synecd. Notit. Episc. Graec.] When the stream of commerce which had enriched the Nabataei had partly reverted to its old Egyptian channel, and had partly taken the new course, which created a Palmyra in the midst of a country still more destitute of the commonest gifts of nature, then Arabia Petraea,[A comparison of the architecture at Wady Mousa, and at Tedmour, strengthens the opinion, that Palmyra flourished at a period later than Petra.] Wady Mousa was gradually depopulated. Its river, however, and the intricate recesses of its rocky valleys, still attract and give security to a tribe of Arabs; but the place being defensible only by considerable numbers, and being situated in a less fertile country than Kerek, was less adapted to be the chief town of the Nabataei, when they had returned to their natural state of divided wanderers or small agricultural communities. The Greek bishopricks of the third Palestine were obliterated by the Musulman conquest, with the sole exception of the metropolitan Petra, whose titular bishop still resides at Jerusalem, and occasionally visits Kerek, as being the only place in his province which contains [p.xi]a Christian community. Hence Kerek has been considered the see of the bishoprick of Petra, and hence has arisen the erroneous opinion often adopted by travellers from the Christians of Jerusalem, that Kerek is the site of the ancient capital of Arabia Petraea.