406 APPENDIX. 



character. Further, since the historical deluge cannot 

 have been of very long duration, the physical changes 

 separating the deposits containing the remains of paleo- 

 cosmic men from those of later date would in like manner 

 be accounted for, not by slow processes of subsidence, 

 elevation, and erosion, but by causes of more abrupt and 

 cataclysmic character. This subject the writer has referred 

 to in previous publications,* and he is glad to see that 

 prominence has recently been given it by so good a geo- 

 logist as the Duke of Argyll, in a late number of the 

 Contemporary Revieio. 



* "Origin of the World," "Fossil Men." See also papers hy 

 Hovrorth in the Geological Magazine for lSl-?-J. 



