In 883 CE, a man appeared in Kairouan, one of the centers of Jewish life at the time and told a tale about the lost tribes of the Northern Kingdom. He called himself Eldad and claimed to be from the tribe of Dan. Since then, the story of the Ten Lost Tribes—that the tribes of the Northern Kingdom still exist intact in a faraway land, living in exile beyond the sabbatical river, a mysterious body of water that was passable only on the Sabbath—has continued to generate excitement. It is astonishing, however, to realize that this motif did not develop until many centuries after the fall of the Northern Kingdom. After the destruction of the Northern Kingdom, many northerners remained in their ancestral homeland in the north. Other northerners lived among their southern compatriots in Judah after fleeing south, while deported northerners and southerners mingled in exile in Mesopotamia. It is only after the end of the Second Temple period that the notion of the Ten Lost Tribes, inviolable and unreachable, developed.