Smithsonian Report, 1913. — Blackwelder. 



Plate 4. 





Fig. 1. — Cave houses in the loess, faced Fig. 3. — A pack train of donl^eys, on the 



with stone. imperial highway over the Loess Plateau. 



Fig. 2. — Men and donkeys carrying coal Fig. 4. — A roadside village and small fields 



from the mines in Shansi. at the bottom of the mountain valley. 



Fig. 5. -a Roadway Sunk Deep into the Loess by Centuries of Travel. 



