Albert von Le Coq and the Uyghur Girl
After visiting the Mohammedan city of Turfan, he travels out into the desert to excavate the ruins of Khocho. Here he stays with a Uyghur family, which includes a beautiful daughter. Her photograph appears in the book. Her name is Zuwida Khan and she has returned to her father's home after the local landowner she'd married (aged 15) has treated her badly. She looks very much like the singer in this video.
Soon after von Le Coq's arrival, Zuwida Khan gives birth to a baby, and von Le Coq records the lullabies she sings, as well as the folk songs of the local Uyghur's king's women. These last he records on a phonograph, which causes so much interest that he is besieged with requests to hear them. He records than he sends his recordings 'unfortunately' to the Berlin Institute of Psychology, but says, in this account, that no one does anything with them.
Uyghur music uses an Arabic scale but has Chinese influences. In other words it is a mixture of European and East Asian stock - very much like the Uyghur people themselves who are the descendents of Indo-European Tocharians and people from Mongolia. When I was at school I remember a history teacher telling the class that the most beautiful people arise when the races mix - something that seems to be true of music too.