GRASSLAND AND FARMLAND—SMITH 371 
FicureE 11. 
Ficures 10 anp 11.—This record from an old Chinese tile tells us why the Chinese 
built the Great Wall. A new blitz had come from the grassland. The horse- 
man with the two-piece bow seems to have been well nigh irresistible on open 
land, hence the wall. (After Carl Bishop.) 
