VOL. VII.] TREE-SPARROW IN IRELAND. 41 



At this point it is convenient to mention that the island 

 of Inishtrahull may be divided into three areas, namely 

 an elevated part at the west side on which is built the 

 fog-siren, its engine-premises, etc., with dwelling-houses 

 for two Hghtkeepers. Here also are situated the premises 

 and dwelling-houses of Lloyd's Marconi operators. As 

 already mentioned the Tree-Sparrows breed under the 

 eaves, etc., of these premises. The second and most 



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Nest of Tree-Sparrow in hole in wall of disused cabin. A stone 



has been removed to show nest. Latter surrounded by a black 



ring to indicate position. 



extensive area comprises all the low-lying ground in the 

 centre of the Island. Here are some eighteen cabins 

 with thatched roofs (save a few with slated roofs), as 

 well as the school-house with a slated roof. This area 

 is the main abode of the Tree-Sparrows, and they nest 

 in quite a number of these premises. The third area 

 rises on the east side in the form of a headland on which 

 the Lighthouse Tower and dwelling-houses for two 



