THE DINOSAUR TAKEN FROM THE ROCK 59 



tions as he went down to death. And when, nearly 

 two years later, all of the skeleton had been taken 

 from the rock, marks were found upon it showing 

 where the teeth of his enemy had pierced the Dino- 

 saur to the bone. 



While chipping the skeleton from its tomb the 

 men had occasionally come across pieces of bone 

 that once were parts of other animals which had 

 been buried in the mud at the bottom of the lake 

 about the same time that the Dinosaur was buried. 

 They also found some of the twigs and leaves that 

 had fallen into the lake and had been turned to fossils 

 in the same mud. All these bones and twigs and 

 leaves made it possible for them to know what kind 

 of vegetation grew on the shores of the lake in which 

 the Dinosaur had died, and also something about 

 the animals which were his neighbors. 



The character of all these fossils and the formation 

 of the rocks that contained them, as well as the 

 position of those rocks in the bluff in which they 

 were found, all helped the men who worked over 

 this Dinosaur to gain an idea of how long a time had 

 passed since his death. To be able to judge of the 



