At only one point does the ancient Arabian trade route that the Lehite party took branch east toward the southeast Arabian coast (that is, toward its ancient port of Qana at modern Bir Ali on the Hadhramaut coast), where most of the incense was shipped — at the templed-city ruins of Shabwah, across the Ramlat Sabcatayn desert, east of Marib (although another possible turn for the Lehite party, albeit somewhat less likely, exists also in the Jawf valley at Wadi Jawf, just a few miles east of tribal Nehem); S. Kent Brown explains that, by ancient Arabian law, it was to Shabwah that all incense harvested anciently in the highlands of southern Arabia was carried for inventorying, weighing, and taxing. Traders additionally made gifts of incense to the temples at Shabwah. But no one knew of this eastward turn in the incense trail, he maintains, except persons who had traveled it or who lived in that territory. This kind of detail in the Book of Mormon narrative, combined with the reference to Nahom, says Brown, is information that was unavailable in Joseph Smith's day. The Prophet, in his early-20s and virtually unschooled when he 'translated' the Book of Mormon, could have known almost nothing, moreover, about ancient Arabia when he began his translation. Indeed, the route-description of the Lehite desert journey (crossing through the northwest-southeast Arabian sectors) matches exactly how one would traverse Arabia today.