(5) 
Plymouth, and its contents, of a much more perfect 
and satisfactory nature than the present brief sketch 
can pretend to be, may, at no very distant period, be 
accomplished and made public. 
At present I shall confine myself to that part of 
this neighbourhood, situated between the estuaries of 
the rivers Plym and Tamar, which is occupied by 
the lime; and shall enter upon this, my subject, 
without further delay:—for my views do not extend 
to the consideration of the widely differing and very 
opposite theories of the Earth, which divide modern 
geologists, with regard to its present external ap- 
pearance, and internal structure; and neither of which 
theories alone can explain, satisfactorily, the various 
phenomena in the mineral kingdom, 
