XXXiv. The Birds of Pembrokeshire. 
doned all its breeding stations off the south-west parts of the king- 
dom, and is very rarely seen at the present day on any part of the 
south-west coasts. 
Caldy, Danish, perhaps from cald, the same as in Cauldron, and 
signifying the Boiling Island,’ from the swift and agitated 
waters off its rocky shores. 
Caldy, a somewhat tamer island, and of less elevation than either 
Ramsey or Skomer, faces Tenby to the south-west, and is parted 
from it by Caldy Sound, about 24 miles in width. Like Lundy, it 
had in old times a considerable population ; there were once up- 
wards of thirty houses uponit, and a Priory ; the ruins of the last 
are stillto be seen. At the present day there is only the mansion of 
the proprietor. Caldy, whose ancient British name was Ynys Pyrr, 
“the island of Pyrus,” is about a mile in length by half-a-mile in 
breadth, and contains an area of 611 acres. On the north side it is 
composed of mountain limestone ; the southern part is old red sand- 
stone. It is a well-cultivated and fertile farm, and there are some 
extensive limestone quarries. In 1828 the present fine light-house 
was erected, which contains a powerful dioptric fixed light, at a 
height of 211 feet above the sea, and in clear weather it is said to be 
visible at a distance of 26 miles. There are a good many cliff birds 
upon Caldy in the summer, that chiefly inhabit its channel, or south, 
side. These consist of Guillemots, Razorbills, Puffins, Herring 
Gulls, and a few pairs of Shags. Some Manx Shearwaters formerly 
nested upon the island, and Mr. C. Jefferys, of Tenby, believes that 
a few still do so, in the fissures of the cliffs. On the Tenby side of 
Caldy is situated St. Margaret’s Island, perforated with vast caverns, 
and at low water connected with Caldy by a reef of rocks. Here 
some forty to fifty pairs of Herring Gulls nest, and a pair of greater 
Black-backed Gulls have also bred here of late years, and a few 
pairs of Shags, with numerous Guillemots and Razorbills, while a few 
Puffins inhabit the rabbit earths on the summit of the cliff. Mr. 
Jefferys informs us that, when he was on St. Margaret’s Island in May, 
1893, he frightened four or five Manx Shearwaters out of holes and 
fissures :—‘‘ They appeared to come from cracks about half-way down 
