133 



eastern portion of this immigration that the Sand-Martin 

 became numerous in the eastern and south-eastern counties. 



Further arrivals took place in Devon and Sussex on the 

 22nd of April and in Sussex on the 26th, while an increase on 

 that date in Somerset probably represented a further arrival 

 in Devon. A third portion of this immigration reached 

 Hampshire on the 27th. The progress of the immigrants 

 could still be traced, as may be seen by reference to the 

 Chronological Summary appended, but the birds had now 

 become so numerous in the western and midland counties 

 that changes in numbers were more difficult to follow than 

 in the eastern and northern counties, which were as yet some- 

 what thinly populated. 



The Sand-Martin continued to arrive during the first ten 

 days of May ; in DeA^on on the 1st, 8th and 9thj and in Kent 

 on the 3rdj 4th and 10th, and the progress of these immigrants 

 was indicated principally through the eastern counties, as 

 well as in North Wales and other more northern counties. 



It was clear that the Sand-Martin arrived along the whole 

 of the south coast of England, and that it appeared first and 

 in greatest numbers to the west of Hampshire. It was not 

 until three weeks after the arrival of the first of these western 

 immigrations that it arrived in any numbers on the south 

 coast to the east of Hampshire, and though early stragglers 

 appear to have spread into the eastern half of England 

 from the west, the main body of the summer-residents in the 

 eastern counties arrived on the eastern half of the south coast 

 during the immigrations in the latter half of April and early 

 in May. 



It will thus be seen that it was not until the immigration 

 was nearly over that Sand-Martins arrived in large numbers 

 in the eastern counties of England ; whereas in the western 

 counties and in Wales they arrived much earlier. 



Nests ready for eggs were found in Hertfordshire on the 

 11th and in Cambridgeshire on the 17th of May. 



