86 



have spread themselves over that and the adjacent 

 counties, and it is possible that they formed the breeding- 

 stock of that district. 



The eastern wing struck the coast of Sussex between 

 the 19th and 22nd April, and can be clearly traced as 

 passing through Berkshire and Surrey to Essex, Cam- 

 bridge, Norfolk, and as far as Yorkshire. These counties 

 probably thus received their resident birds. 



In numbers and extent the fifth immigration, wliich 

 took place on the 25th and 26th April, was practically a 

 replica of the preceding one. The main body of the 

 western wing, however, instead of leaving the country 

 on the north coast of Wales, appears to have had its 

 centre further to the east, and to have passed through 

 Cheshire into Lancashire and the north, its extreme 

 western edge alone leaving the country. The eastern wing 

 following the same course as before is traceable as far as 

 Yorkshire, which was reached on the 29th April. 



Swallows continued to arrive both in Devon and in 

 Sussex in smaller numbers during the first three weeks in 

 May, and they appear to have taken much the same 

 routes as former arrivals, but the number of summer 

 residents then in the country renders it impossible to 

 trace satisfactorily the movements within our limits of 

 these later arrivals. 



There seems little doubt, however, that Swallows passed 

 right through the country both by the clearly defined 

 north-western and, more markedly, by the rather ill- 

 defined north-eastern route throughout the whole of May. 



We have been obliged, however, to consider these 

 migrants as outside the scope of our enquiry for this year, 

 as it would be useless to attempt to determine their routes 

 without reference to records from stations outside England 

 and Wales.* 



* Since writing the above we have consulted Mr. W. Eagle Clarke's 

 paper on the Migrations of the Swallow (4th Interim Report of the Comm. 

 app. by the B.A., 1901, pp. 9 and 10). By reason of our large number of 

 inland observers we have been able to trace in greater detail the spring- 

 immigration of the Swallow in England and Wales, but as far as the general 

 facts elicited are concerned they coincide (in a remarkable way) with Mr. 

 Clarke's observations on the " Spring Immigration of Summer-Visitants." 



