REPORT 



ON THE MIGRATIONS IN THE SPRING OF 1913 AND 

 THE AUTUMN OF 1912. 



INTRODUCTORY. 



The Ninth Report, which covers the autumn-migrations of 

 1012 and the spring-migrations of 1913, is drawn up on 

 similar lines to those previously issued, so as to facilitate 

 comparisons between the different years, when the present 

 enquiry has been completed. 



The number of records supplied by our observers again 

 shows an increase, and the labour entailed in classifying the 

 facts and attempting to condense them has caused con- 

 siderable delay in the appearance of the present Report. 

 The records from the light-stations during the autumn of 

 1912 were particularly voluminous, and the preparation 

 of this section alone has occupied a far greater amount of 

 time than has hitherto been necessary. The Committee are 

 glad to record that, owing to the appointment of Mr. R. E. 

 Wilson to the Caskets Lighthouse early in 1913, they have 

 been able at last to obtain returns from that important 

 station. Previous attempts to obtain the co-operation of 

 the keepers at the Caskets had been unsuccessful, and the 

 thanks of the Committee are particularly due to Mr. Wilson 

 for taking up this work and for stimulating his colleagues to 

 carry it on during his absence on shore. The Caskets 

 Lighthouse is one of the most important stations from the 

 Committee's point of view, and the annual mortality there 



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