200 
Professors Whitney and Marsh to be of early Pliocene age. 
They are taken from Bancroft's work. I am compelled to 
say that I think it requires a very unsuspecting and credulous 
mind to believe that these beautiful mortars were produced 
by man when not a single land mammal now living oth 
than man (the one exception) had made its appearance m the 
palaeontological procession. 
