The New York Times, March 2, 2003
You probably haven’t heard of the Yagnob, but Spencer Wells has. In fact, he traveled to war-torn Tajikistan to meet these Central Asian people, driving an old Soviet van over mountain passes and along dirt roads of the remote Zerafshan Valley. The Yagnob were not so hard to find 1,500 years ago. They were masters of the Silk Route, and their language was the lingua franca of trading merchants from Persia to China. But the Yagnob have dwindled, and by the time Wells reached the Zerafshan Valley, he could find only a single village where Yagnobi was still spoken.