Just to add here, the article's author is an expert on middle period (Tang-Song) China (her first book was on local deities, her second on contracts). She then

Just to add here, the article's author is an expert on middle period (Tang-Song) China (her first book was on local deities, her second on contracts). She then shifted her focus a bit westward to the Silk Road. She has apparently shifted her focus yet again. I'm not an expert on pre-Columbian archaeology. But neither is she.