HAMrSTEAD HILL. 



It occupies parts of Berkshire, Hampshire, Surrey, and Kent, 

 forms almost the whole of Middlesex, and by far the greater part 

 of Essex. 



Thus we see that the clay of Hampstcad Hill is by no means 

 an isolated mass, but that it is merely an elevated portion standing 

 above the general level of the present surface of a very extensive 

 formation, the whole of which must therefore have been produced 

 by deposition in one sea and during one epoch of time. 



