THE ARBORETUM 
179 
stituents of the dark, sombre forests of Tierra del Fuego. There 
is a tree of the golden chestnut ( Castanopsis chry sophy lla), the lower 
surface of whose leaves is tawny yellow. 
A little to the west of these heaths is a mound, on the slope of 
which a few Lebanon cedars are growing. This mound is interesting 
as the site of “ The Mosque,” one of the numerous 
structures erected by Sir William Chambers about 
1760. It is a curious instance of the survival of names 
in a corrupt form that this mound should be still known among the 
workmen as “ Moss Hill.” On the south side of it there is a quaint 
avenue of Irish yews opening on to the Old Deer Park, across which, 
nearly a mile away, can be seen the old square tow r er of Isleworth 
Church. There is a similar avenue on the opposite side of the 
Pagoda. 
Site of the 
Mosque. 
