Then add to these things the comparative immunity from the many dangers that beset the nests of our birds,--dangers from squirrels, snakes, crows, owls, weasels, etc., and from violent storms and tempests,--and one can quickly see why the British birds so thrive and abound. There is a chaffinch for every tree, and a rook and a starling for every square rod of ground. I think there would be still more starlings if they could find places to build, but every available spot is occupied; every hole in a wall, or tower, or tree, or stump; every niche about the farm buildings; every throat of the grinning gargoyles about the old churches and cathedrals; every cranny in towers and steeples and castle parapet, and the mouth of every rain-spout and gutter in which they can find a lodgment. The ruins of the old castles afford a harbor to many species, the most noticeable of which are sparrows, starlings, doves, and swallows. Rochester Castle, the main tower or citadel of which is yet in a good state of preservation, is one vast dove-cote. The woman in charge told me there were then about six hundred doves there. They whitened the air as they flew and circled about. From time to time they are killed off and sent to market. At sundown, after the doves had gone to roost, the swifts appeared, seeking out their crannies. For a few moments the air was dark with them. Look also at the rooks. They follow the plowmen like chickens, picking up the grubs and worms; and chickens they are, sable farm fowls of a wider range. Young rooks are esteemed a great delicacy. The four-and-twenty blackbirds baked in a pie, and set before the king, of the nursery rhyme, were very likely four-and-twenty young rooks. Rook-pie is a national dish, and it would seem as if the young birds are slaughtered in sufficient numbers to exterminate the species in a few years. But they have to be kept under, like the rabbits; inasmuch as they do not emigrate, like the people. I had heard vaguely that our British cousins eschewed all pie except rook-pie, but I did not fully realize the fact till I saw them shooting the young birds and shipping them to market. A rookery in one's grove or shade-trees may be quite a source of profit. The young birds are killed just before they are able to fly, and when they first venture upon the outer rim of the nest or perch upon the near branches. I witnessed this chicken-killing in a rookery on the banks of the Doon. The ruins of an old castle crowned the height overgrown with forest trees. In these trees the rooks nested, much after the fashion of our wild pigeons. A young man with a rifle was having a little sport by shooting the young rooks for the gamekeeper. There appeared to be fewer than a hundred nests, and yet I was told that as many as thirty dozen young rooks had been shot there that season. During the firing the parent birds circle high aloft, uttering their distressed cries. Apparently, no attempt is made to conceal the nests;