Data Campbell's No. of 
No. 
No. in 
A.J 
Book, 
Eggs. 
THE JACKSONIAN OOLOGICAL COLLECTION. 
inches across, and is comparatively very light. On the 2nd of August the nest contained 2 eggs, and 
also on the 4th, but on making a careful examination of it when measuring it afterwards, I was 
pleasantly surprised to find a third egg embedded in the lining, it having evidently been laid before the 
bird had finished padding the interior. It was a lucky find, and now makes a complete set of 3, all of 
which possess minute specks of brown on the larger ends, though asa rule, these eggs are absolutely 
devoid of markings. I experienced much difficulty in taking the flashlight photograph of this nest on 
page 103, owing to the very awkward way in which I had to fix my camera inside the mouth of the 
Showing the entrante or opening to the cave in which the Rock Warbler’s nest was found. 
Loc., Blue Gum Gully, Chatswood, near Sydney. 
(See data No. 5474.) 
cave, to enable me to get a proper view of my subject. Four exposures were made on the one plate, 
extending over four minutes ten seconds, the intervals being necessary in order to allow the congested 
smoke from the magnesium light to escape from the cave, otherwise the picture would have been totally 
fogged and destroyed. The other two photographs show, from two different positions, the cave from 
thé outside, and give a persona good idea of the class of country which this bird loves to live in. 
This nest did not contain an egg of the Fan-tailed Cuckoo, as was the case with the former nest, but 
104 
