Tafas was a Hazimi, of the Beni Salem branch of Harb, and so not on good terms with the Masruh. This inclined him towards me; and when he had once accepted the charge of escorting me to Feisal, we could trust him. The fidelity of road-companions was most dear to Arab tribesmen. The guide had to answer to a sentimental public with his life for that of his fellow. One Harbi, who promised to take Huber to Medina, and broke his word and killed him on the road near Rabegh when he found out that he was a Christian, was ostracised by public opinion, and, in spite of the religious prejudices in his favour, had ever since lived miserably alone in the hills, cut off from friendly intercourse, and refused permission to marry any daughter of the tribe. So we could depend upon the good will of Tafas and his son, Abdulla; and Ali endeavoured by detailed instructions to ensure that their performance should be as good as their intention.