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50 
SELBORNIANA. 
Tree Photographs at the Natural History Museum. — 
Mr. Henry Irving has just completed his magnificent display 
of photographs of British trees in the Central Hall of the 
Natural History Museum in Cromwell Road. The trees are 
each represented by two large views taken from the same 
position in summer and in winter respectively, and by a nearer 
view exhibiting the detail of the bark. Many other structural 
points are also illustrated in this display, which should do much 
to advance among Londoners the now growing taste for our 
trees. 
Tree Photographs in the Natural History Museum. 
Marlborough Grey Wethers. — The National Trust has an 
option to purchase some examples of the Sarsen Stones on the 
Marlborough Downs which are traditionally known as the Grey 
Wethers. These Sarsen Stones are geologically hardened and 
solidified portions of a stratum of Eocene sand which formerly 
covered the Chalk. In the course of ages the sand has been 
denuded, and these Sarsens alone remain. They vary in size 
from small boulders to vast masses of 60 to 70 tons. They 
are found as scattered blocks over a wide area of the Chalk 
country ; but in the neighbourhood of Marlborough are in 
