S I R S , -- I t is extremely interesting to have Mr. Dewar's notes on the Roosting of Rooks, taken t h i r t y years ago, over the same area t h a t I dealt with in the August number of British Birds. It is of great importance t h a t the two sets of notes agree so closely in all essentials. The roost Mr. Dewar records as being east of Corbridge might well have been the main roost in t h a t area,...

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