It was a passion which surmounted every tie of affection or interest. ‘You have prayed for your father: why do you not pray for your mother?’ a Yemenite was asked near the Kaaba. ‘For my mother!’ said the Yemenite, ‘How could I? She was of the race of Māad.’”[92] The Yemenites at a very early period founded the strong and opulent Himyarite Kingdom. The Himyarites were the navigators of the East and they were celebrated for their skill in manufacture as well as for enterprise in commerce; they had a written language, inscriptions in which were discovered all over south Arabia during the present century. The Māadite or Ishmaelite Arabs on the contrary were more nomad in their habits and were masters of the caravans which carried the enormous overland trade by the two great trunk-lines of antiquity, from the East to the West. One of these lines extended from Aden, (Arabia Emporium of Ptolemy) along the western part of the peninsula and through Yemen to Egypt; the other extended from Babylon to Tadmor and Damascus. A third route, nearly as important, was also in the hands of the Ishmaelite Arabs, by Wady Rumma and Nejd to the old capital of the Himyarites, Mareb.[93] These caravans unified the Arabian peninsula and fused into one its two peoples; the northern Arabs receiving somewhat of the southern civilization and the southern Arabs adopting the language of the north. But the decline in the caravan trade brought disaster to Arabia; the ship of the desert found a competitor in the ships of the sea. Old settlements were broken up, great cities, which flourished because of overland trade, were abandoned and whole tribes were reduced from opulence to poverty. In this time of transition, long before the birth of Mohammed, the Arabic nation as it is known to modern history seems to have been formed.