70 Proceedings of the Royal Irish Academy. 
a slower rate of increase than this. It would seem, then, that we 
may safely calculate on an antiquity of nearly, and perhaps even 
more than, 4000 years for these log huts. 
Another interesting fact corroborating their great antiquity is 
this, that the giant pine-trees which are found at various levels in 
this bog were not found below the ‘horizon,’ on which the settle- 
ment stands, but directly above it. We, therefore, seem entitled to 
conclude that pine-trees were not yet growing in this locality when 
the huts were built. 
