108 
Fig. 28. Lower Twin cave (part of Shawnee cave) looking north. Ilere the 
roof collapsed at a right-angled turn in its course where it appears to have been 
joined by another cave from the south. The location of a sink here caused a col- 
lapse similar to the preceding case. The water formerly flowed from the upper cave 
teward the east and then turned north into this opening—does at present during 
high water—but now occupies a cutoff between the two caves, 
