Two days from thence stands Mosul, mentioned in Scripture as Ashur the great, which contains about seven thousand Jews, the principal of whom are R. Sakhai, the prince, a descendant of King David, and R. Joseph, surnamed Borhan-al-Phulkh, who is astronomer of Seifeddin, the brother of Noureddin, king of Damascus. This city, situated on the confines of Persia, is of great extent and very ancient; it stands on the banks of the Tigris, and is joined by a bridge to Nineveh. Although the latter lies in ruins, there are numerous inhabited villages and small towns on its site. Nineveh is on the Tigris, distant one parasang from the town of Arbil[216]. Mosul contains the synagogues of Obadiah, of Jonah, son of Amittai, and of Nahum the Elkoshite. It is three days hence to Rahabah, which is Rehoboth, by the river Euphrates, and contains about two thousand Jews, the principal of whom are R. Ezekiah, R. Ehud, and R. Isaac. The city is surrounded by a wall, it is very handsome, large, and well fortified; and the environs abound with gardens and orchards. One day to Karkisia[217], the Carchemish of Scripture, on the banks of the Euphrates, containing about five hundred Jewish inhabitants, of whom the principal are R. Isaac and R. Elchanan. Two days to Juba, which is Pumbeditha, in Nehardea; it contains about two thousand Jews, some of them eminent scholars. The rabbi R. Chen, R. Moses, and R. Eliakim are the principal. Here the traveller may see the sepulchres of R. Juda and R. Samuel, opposite two synagogues which they erected during their lives; as well as the sepulchres of R. Bosthenai, the prince of the captivity, of R. Nathan, and of R. Nachman, the son of Papa[218]. Five days to Hardah (or Hadrah), containing fifteen thousand Jews, of whom R. Saken, R. Joseph, and R. Nathaniel are the principal. Two days to Akbara, the city which was built by Jeconiah, king of Juda; it contains about ten thousand Jews, the principal of whom are R. Joshua and R. Nathan.