SINO-MONGOLIAN FRONTIER 
With this we were content and continued our 
homeward journey. 
Once more reaching Tsing-lo Hsien, we decided 
to take a different course from that followed on 
our outward journey, so turned eastward up a 
large tributary of the Fén Ho. 
Following this up to its source we crossed two 
high passes in a granite dyke, which here pro- 
trudes through the grey limestone. The last day 
into T’ai-yiian Fu, we travelled for about ten 
miles along a deep and narrow gorge in the same 
formation, finally issuing out upon the plain at its 
northernmost point. 
The last fifteen miles were quickly traversed, 
and we found ourselves home once more after a 
most enjoyable and successful trip. 
We had explored and mapped the greater 
portion of the upper reaches of the Fén Ho, had 
discovered some hitherto unknown lakes and 
extensive forests, and had brought out a good 
collection of mammals, amongst which one at 
least was new to science, while six were new to 
the Institution we represented. 
We had enjoyed as good sport as any one 
could wish for, so that we felt well satisfied with 
our winter’s work. 
After our return to T’ai-yiian Fu, our work was 
discontinued for over a year while we paid a visit 
to Europe. 
59 
