14 



F. H.W.GREEN 



Fig. I. The distribution of arable land in Scotland. (From L. D. Stamp: The Land of 

 Britain, Longmans, Green & Co., London, 1948). 



historical record that much of the now most fertile land was peaty until 

 it was either drained or the peat taken away or both. 



It is important to see where the threshold Hne, as here described, passes 



