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332 aquatic plants, but I have noticed in it (indeed, I have seen the birds placing and carrying them) water-logged sticks of some size, one end of which is fixed amongst the mass, whilst the other sinks down into the mud, and the tangle that may spring from it. Such sticks must act as so many anchors, and may, perhaps, be the chief means by which the nest is kept stationary. To judge by the two birds which I particularly watched, the great crested grebe has the habit of building several nests, and, besides this, the male makes a small platform of weeds just off the edge of the bank, and near to the nest. Sometimes he seems in doubt whether to take his weeds to the nest or the platform, and in this hesitation, and in the building of more than one nest, we may, perhaps, see the origin of the latter structure. With regard to this, and some other points which seemed to me of interest, I may refer to a paper of mine which has lately appeared in the Zoologist. In this I give a minute account of the nest-building and some other habits of these birds, as illustrated by a pair which I watched very closely; and I will here record my conviction that there is more to be learnt by such watching of any one species, or even any one individual bird, than in the killing or robbing of thousands.

When I say this, it is not only of the interest that there is in a creature's ways and habits that I am thinking, but also of the light that these may, at any moment, throw upon its descent and affinities—upon all those questions and subjects which are