81 



same day an increase was noted inland in Hampshire, from 

 whence the birds appear to have spread into Somerset and 

 Grlamorgan on the 7th, into Surrey on the 8th, Berkshire on 

 the 9th, Cambridge, Shropshire and Worcester on the 11th. 



A second detachment o£ this immigration appears to have 

 landed on April the 8th and 9th over the greater part of the 

 western half of the south coast, but was only actually 

 recorded in Cornwall and Dorset. We find an increase in 

 Wiltshire and a further increase in Surrey on the 11th, and 

 the birds seem to have reached Denbigh, Cheshire, and 

 Derby on the 12th, while others were still passing through 

 Somerset and Gloucester on the same day. 



The earlier birds evidently reached Yorkshire on the 13th, 

 Durham and Northumberland on the 15th, and Dumfries on 

 the 16th ; the later arrivals were recorded from Stafford and 

 Derby on the 13th and Shropshire on the 14th. 



The third immigration, which was the first really large 

 one, extended along the whole of the south coast between 

 the 13th and 22nd of April, but the bulk of the birds arrived 

 to the west of the Isle of Wight, and it was not till the 

 14th and 15th that they began to arrive to the east of that 

 point. The largest arrivals seem to have been on the 13th, 

 18th, 20th and 22nd, many passing inland as far as Berk- 

 shire on the first-mentioned date and to Hertfordshire on the 

 following day. 



On the 15th the westerly wing had reached Cheshire, 

 and, on the east, birds were to be found in Essex and Cam- 

 bridge ; on the next day they appeared in Suffolk, Norfolk, 

 Nottingham, Yorkshire and the Isle of Man, and there is 

 evidence that a number of the eastern birds left the country 

 by the coasts of Norfolk and Lincoln. 



The arrival of the large flight of Willow-Warblers on 

 April the 20th appears to be remarkable, as having been the 

 only one that occurred before midnight, all the others having 

 taken place in the early hours of the morning. 



It is almost impossible to describe in an intelligible manner 

 the course taken by these different arrivals through the 

 country, coming in, as they did nightly, during a period of 



