146 



SKETCHES OF CREATION. 



What a change in the condition of things since those little 

 animals lived in the shallow surface-waters in which those 

 sediments accumulated ! Lo ! here above us is a mirror- 

 surface gleaming in the light reflected from our lamps. 

 Its polish is like that of jet, and yet it is wrought upon the 

 face of the solid rock. Some slight movement of the 



