378 JIR. J. H. GURNEY ON THE ECONOMY OF THE CUCKOO. 
aucl it has only happened in this county about three times ; on 
Household Heath (T. E. Gunn, Zool. 1865, p. 9618), at Cringleford, 
and at Braconash. On one of these occasions I was told they both 
lived until they were a considerable size, and then one died, instead 
of being immediately ejected by the other young Cuckoo as might 
have been anticipated. The two on Household were in a Titlark’s 
nest, and what added very much to the discovery was the circum- 
stance of an addled Cuckoo’s egg with the young Cuckoos. There 
must, therefore, if there was no mistake about it, have been three 
Cuckoo’s eggs at one time in the nest, a portentous prospect indeed 
for the poor Lark ! 
The accompanying sketch, by Hrs. Hugh Blackburn, originally 
published in 1872, shows in an artistic manner the still blind 
young Cuckoo, standing up to eject a Titlark older than itself, 
by means of its strong wings and concave back. The resemblance 
of the wings to a man’s hand and arm is very noticeable, and they 
are evidently of the greatest use in helping the Cuckoo to get 
underneath the unlucky Titlark, which thus propped up and lodged 
on the Cuckoo’s back, is soon shouldered out of the nest. 
