FOURTH SEASON (1921) : RECORD 141 
returned and sitting in tree K 1 for only a few 
minutes flew to the nest side at 4.15, remained for 
nearly forty seconds, and laid her tenth egg, 
removing the substituted Meadow Pipit’s. Helping 
in our observations to-day were P. B. Smyth and 
O. R. Owen. 
The Laying of the Eleventh Egg , June 5. 
To-day our party consisted of Mr. and Mrs. 
H. F. Witherby, Miss Turner, Mr. and Mrs. Philip 
Gell, O. R. Owen of Knighton, C. H. Roper, the 
two Simmondses, and myself. 
It will be noticed that a second break in the 
Cuckoo’s regular laying occurred on the 3rd. On 
that day the common had been most carefully 
guarded throughout the day at every point, since 
we then knew of no available nest, though in point 
of fact the fourth nest of No. 7 pair must have 
had one egg. This nest when found yesterday at 
7.30 a.m. contained only one egg, but on looking 
at it again this morning about 10 a.m. it held three. 
This clearly proves that the second egg w r as laid 
after 7.30 a.m. yesterday, and that the nest must 
have had one egg on the 3rd and so been in suitable 
condition for the Cuckoo. 
The fourth nest of No. 9 pair had two eggs 
