There is a vast collection of facts as to why when and where birds migrate and amongst other conjrctures as to how they accomplish their journeys is the assumption made by most ornithologists that they possess the power of recognition and proceed from point to point by the help of landmarks. With some of these the war must have interfered to a very considerable extent, for example, the lights of seaside towns and of lightships. In the place of friendly and accustomed lights migratory birds must have witnessed the whole sky swept unceasingly by immense searchlights projected from land and sea. Mr. Horace Hutchinson, discussing this subject in the Cornhill" thinks that the presence of these new and the obliteration of old lights must have—effected migrations which have taken place noe last August very considerably. ginal from
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