38 The Arab Horse 



and Tigris, between those rivers and 

 the Persian boundary. Hagar, mother 

 of Ishmael, was Abraham's concubine. 

 After the birth of Isaac, Ishmael's half- 

 brother, she was driven into the desert 

 with her fourteen-year-old son by the 

 jealousy of Sarah, Isaac's mother. Arab 

 tradition supplements Bible history by 

 telling us that when Ishmael was sent 

 away with his mother he lamented his 

 barren heritage. He was assured, how- 

 ever, that there was reserved for him the 

 most valuable gift to men. This he sub- 

 sequently discovered was the horse of 

 the Kuhl race, which he found in Hejaz. 

 The two branches of descendants from 

 Abraham were as follows: 



