RETROSPECT. 



413 



the Country of the Iguanodon — and the Architect 

 obtains from beneath the petrified forest, the ma- 

 terials with which to construct his temples and his 

 palaces : while from these various strata, the Geo- 

 logist gathers together the relics of the beings that 

 lived and died in periods of unfathomable anti- 

 quity, and of which the very types have long since 

 been obliterated from the face of the earth, and 

 by these natural memorials is enabled to determine 

 the nature and succession of those physical revolu- 

 tions, which preceded all history and tradition. 



