George Albert Cooke, 1911 Encyclopædia Britannica, Volume 21… (1911)
“ Walled in by towering rocks and watered by a perennial stream, Petra not only possessed the advantages of a fortress but controlled the main commercial routes which passed through it to Gaza in the west, to Bostra and Damascus in the north, to Elath and Leucè Comè on the Red Sea, and across the desert to the Persian Gulf. From the ‛Arāba travellers approach by a track which leads round Jebel Hārūn (Mt Hor) and enters the plain of Petra from the south; it is just possible to find a way in from the high plateau on the north ”
