Quart. Journ. Geol. Soc. Vol. LXIII, PL XVI. 



Photo, by the late Col. F. W. Rhodes. 



The Batoka Gorge at the sharp bends just below the confluence of the Songwi 

 River; showing promontories ('knife-edges') partly destroyed by weathering, and 

 a lower pinnacle (in the middle of the picture) cut off by an ancient channel 

 of the river. 



