SIRS,--For exactly a fortnight--May 14th to 27th, 1913-- a mysterious bird was heard calling from the marshy border of Betton Pool, near Shrewsbury. Cartwright, the keeper, an observant man, who is familiar with the notes of all the ordinary water-fowl (which resort to the pool in considerable variety) reported it to me as something ·entirely different from any bird-note he had ever heard. I went...

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