CHAPTER XI. 
WILD GARDENING ON WALLS OR RUINS. 
ol uli 
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HIN 
aoe 
Arenaria balearica, in a hole in wall at 
Great Tew. 
THERE are many hundred species 
of mountain and rock plants 
which will thrive much better 
on an old wall, a ruin, a sunk 
fence, a sloping bank of 
stone, with earth behind, 
| than they do in the most 
carefully prepared border, 
and therefore their culture 
may be fittingly considered 
here, particularly, as once 
|, established in such positions 
they increase and take care 
of themselves unaided. In- 
deed, many an alpine plant 
which may have perished 
in its place in the garden, 
would thrive on any old wall near at hand, as, for example, 
the pretty Pyrenean Erinus, the silvery Saxifrages of the 
Alps, pinks like the Cheddar Pink, established on the walls 
