INDIAN ROCK-PICTURES 485 
toed foot had trod on the rock while still soft ; but 
they are scattered, not consecutive. It is not so 
Fig. 22. — Group of Pictures at Jauarite Caxoeira, Rio Uautes. 
easy to explain these by natural causes as it is that 
of the panellas or pots, which are cylindrical holes 
frequently met with on the rocks of the falls of the 
Rio Negro and Uaupes ; these have been worn — 
