24 SEPTEMBER 1892, Page 15

THE CUCKOO.—BIRD-MIGRATION.

[TO THE EDITOR Or THE " SPECTATOR."]

Sin,—Your readers interested in the first of these questions might find some information in the second volume of the fourth edition of Yarrell's " British Birds," or in the article on the subject in the last edition of the "Encyclopaedia Britannica." This work also contains a good deal that had not before been generally known concerning the second question, to be found in the third volume, under the heading

"Birds," and sub-heading " Migration." I may add that the later observations of Herr Adolf Muller, who had hitherto been regarded as a credible witness, have given rise to a good deal of amusement in Germany, where the best-informed ornithologists refuse to accept them.—I am, Sir, &c.,

ANPIEL.