353 
LATHYRUS NISSOLIA AND OTHER RARE 
PLANTS AT SANDAL, NEAR DONCASTER. 
H. H. CORBETT. 
Asout two and a half miles from Doncaster, on the Thorne Road, 
are the Sandal Brickfields. On August 3rd, I paid a visit to them 
with Mr, F. Arnold Lees and Mr. Pickard, our object being the 
confirmation or otherwise of my note (‘ Naturalist,’ August 1897) on 
the occurrence of Zathyrus nissolia in this locality. After our visit, 
Mr. Lees asked me to write a short account of what we had seen, for 
the ‘Naturalist.’ This I proceed to do. 
_Geologically, the isolated patch of clay forming the brickfields 
is interesting. The whole way from Doncaster the soil consists of 
post-glacial gravels, with Bunter sandstone below. But here the 
Bunter appears to have been locally denuded at some pre-glacial 
‘me, while during the glacial period when the Scandinavian glacier 
blocked up the Humber and consequently the Don, the hollow 
Previously formed was filled with water which gradually deposited a 
fine bluish laminated clay, showing no trace of organic remains, nor 
Containing any pebbles or boulders. It is to all appearance a warp 
clay, but is situated far above the true warp lands, being about forty 
feet above sea level. This clay has been worked for the manufacture 
of bricks since. 
as dug 
bably 
accumulated 
germinating ? 
These questions, easy to 
but in my own 
2 barely probable solution. 
_- the plant has been an integer of the 
mena and independently of the removal of the clay, 
7+ 
West Riding flora con- 
it is difficult 
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