← The Travels of Marco Polo — Volume 2
Marriage
The China Review, Vol. XX. “gives numerous instances of marrying mothers-in-law and sisters-in-law amongst the Hiung nu. The practice was common with all Tartars, as, indeed, is stated by Yule.” (E. H. Parker, Asiatic Quart. Rev., Jan., 1904, p. 141.)
LII., p. 257 n.