So before we had got home I told her that "perhaps" the reason why the birds all came to England to build their nests and lay their eggs here, was because they wanted their young ones to learn the best of manners and to go to the best of bird-schools. "Some of these birds come from countries where the people are called savages, because their behaviour is shocking, and they have no schools, and so (perhaps) the birds come here because they want the little ones to be nicely brought up." It is not much of a reason, I confess. It will not probably satisfy Professor Ptthmllnsprts. But it satisfied my small companion, for she approved the conduct of the old birds. And when you can satisfy a child on a point that you can not satisfy a grown-up person on, you have got some way, depend upon it, towards the truth. There must be some advantage in the migration of birds, or it would not happen with such pitiless regularity. But it does not look as if the advantage were on the side of the birds. And now to get back to my thrush. When this bird was first identified with both throstle and "mavis" is a pretty point that some bird-lover might care to follow out. It certainly is quite of modern date, for I find Spenser making the mavis as one bird "reply" to the thrush as another; in poet-laureate Skelton's poem the "threstill" is contrasted with the mavis--"the threstill with her warblynge, the mavis with her whistell"--and quite as explicitly in Gascoigne. Harrison, again, clearly distinguishes the two as being different birds. So that the thrush-throstle-mavis was not a single bird before, at any rate, the middle of the seventeenth century. And for myself, I should not be surprised if it were found on inquiry that the mavis was originally the blackbird, and that it is an old English word, and not a Scotch one, any more than "merle." At any rate, this much is certain, that Chaucer's English was "a well of English undefiled"; and he sings both of mavis and of merle as of birds that he knew. And in Chaucer's day, Scotland was a fearsome region situated "in foreign parts," and inhabited by a race of human beings who only differed from Irish in being worse. And Chaucer did not speak Scotch. But, as I have said, the origin of our bird-and-beast names is a very pretty subject still awaiting the philological naturalist, and when that curious person is forthcoming he ought to make his subject one of a very curious and lasting interest.