50 Egypt fied the tribes of Arabia under the leadership of the family of Ibn Saud. This movement had reached its highest point under Ibn Saud II., who captured the Sacred Cities and threatened Bagdad and Damascus. By 1806 all Arabia was Wahabite, and was closed to other Mahomedans even as pilgrims. Their corsairs closed the Red Sea and covered the Indian Ocean. The Wahabites thus pin-pricked two empires in their tender points—the Ottoman Empire in its spiritual authority, and the British Empire in its sea-power. This brought invita- tions to Mehemet Ali from the British for a naval alliance against the Arabs. But Mehemet Ali was too wary. "The great sea-fish swallows the small/1 said he to Burckhardt, the emissary of the British Africa Society. "England/5 he went on, "will take Egypt some day as her share of the Ottoman Empire/' He had no inten- tion of hastening that day. On the other hand, he readily responded to the Sultan's appeal for assistance by despatching all his most troublesome Albanians to recapture the Holy Cities. In this enterprise they were led into an ambush, and lost two-thirds of their number. And thus relieved of his inconvenient compatriots, Mehemet Ali thereupon rid Egypt itself of the remainder of these troublesome mercenaries. He then felt safe enough to send his new native regulars to Arabia, where they retook Mecca and restored the pilgrimage (1812). We may note with interest that one of his new Arabian governors was a Scotchman Keith, a prisoner from Frazer's force, who had islamised and fought his way to the front* Ibn Saud, however, had recourse to guerilla warfare with such success that Mehemet Ali was forced to take com- mand himself, a mistake that nearly cost him dear, and that was not repeated. For in his absence the Turks got