i8 
THROUGH ASIA 
The future traveller to Lop-nor must not content himself 
with proving the existence of the basins discovered by 
Przhevalsky ; he must make a systematic and accurate 
investigation of the districts north of them, in order to 
try and find the lake into which the Tarim, according 
to Von Richthofen, empties a portion of its waters. This 
lake, too, is marked on the Chinese maps, which as a rule 
are remarkable for their great topographical accuracy. 
