The young cuckoo appeared to rest more quietly in the nest now, but after a couple of hours the old fidgeting began again, and increased until he was in the same restless state as before. The rapid growth of the birds made the position more and more miserable for the cuckoo, since the robin, thrust against the side of the nest, would throw his head and neck across the cuckoo's back, and he could not endure being touched there. And now a fresh succession of struggles began, the whole process being just the same as when the egg was struggled with. But it was not so easy with the young bird, not because of its greater weight, but because it did not roll like the egg and settle in the middle of the back; it would fall partly on to the cuckoo's back and then slip off into the nest again. But success came at last, after many failures. The robin was lying partly across the cuckoo's neck, when, in moving its head, its little curved beak came down and rested on the very centre of that irritable hollow in the back of its foster-brother. Instantly the cuckoo pressed down into the nest, shrinking away as if hot needles had pricked him, as far as possible from the side where the robin was lying against him, and this movement of course brought the robin more and more over him, until he was thrown right upon the cuckoo's back. Instantly the rigid fit came on, and up rose the cuckoo, as if the robin weighed no more than a feather {20} on him; and away backwards he went, right up the nest, without a pause, and standing actually on the rim, jerked his body, causing the robin to fall off, clean away from the nest. It fell, in fact, on to a large dock leaf five inches below the rim of the nest, and rested there. After getting rid of his burden the cuckoo continued in the same position, perfectly rigid, for a space of five or six seconds, during which it again and again violently jerked its body, as if it had the feeling of the burden on it still. Then, the fit over, it fell back, exhausted as usual. I had been singularly fortunate in witnessing the last scene and conclusion of this little bloodless tragedy in a bird's nest, with callow nestlings for _dramatis personæ_, this innocent crime and wrong, which is not a wrong since the cuckoo doesn't think it one. It is a little curious to reflect that a similar act takes place annually in tens of thousands of small birds' nests all over the country, and that it is so rarely witnessed. Marvellous as the power of the young cuckoo is when the fit is on him, it is of course limited, and when watching his actions I concluded that it would be impossible for him to eject eggs and nestlings from any thrush's nest. The blackbird's would be too deep, and as to the throstle's, he could not move backwards up the sides of the cup-like cavity on account of the smooth plastered surface.