After Abdallah 's death , Hasan 's position in Mosul was challenged by his uncles .
Mosul was not until 935 that Abdallah was able to secure confirmation by Baghdad of Abdallah 's control over Mosul and the entire Jazira up to the Byzantine frontier .
After Abdallah 's death , Hasan 's position in Mosul was challenged by his uncles , and it was not until 935 that he was able to secure confirmation by Baghdad of his control over Mosul and the entire Jazira up to the Byzantine frontier .