Willy, "would nettles be to them during the cold weather in England?" Well, they meant to nettle themselves, and so chafe their skins so as to enable them to bear the cold better. And tough skins they must have had, for the poison of the Roman nettle is much more severe than that of the two common species. Camden, I believe, tells the story; as I said, you may believe it or not. Do you see that tortoiseshell butterfly hovering near the nettles? Its larva was a greenish-black caterpillar with yellow stripes, and it lived, when in that state, entirely on the leaves of the nettle; the larvae also of other kinds of butterflies feed on this plant, as the admiral butterfly, and the peacock butterfly. I have eaten the young shoots of the common nettles in the spring of the year; they do not make a bad substitute for spinach. [Illustration: LARVA, CHRYSALIS, AND INSECT OF THE SMALL TORTOISE-SHELL BUTTERFLY. (_Vanessa urticae._)] How prettily the yellow flags skirt the pool; there, you see, is the common branched bur-reed, with its sword-like leaves and round heads of flowers; a little way in the pool is the pretty arrowhead with its large conspicuous arrow-shaped leaves and flesh-coloured flowers, both leaves and flowers standing several inches out of the water. In the water, too, I see the brown leaves of the perfoliate pondweed; they are almost transparent, and look when dry something like gold-beater's skin. I see also the cylindrical tufts of the horn-wort with its bristle-like leaves often several times forked. It grows entirely under the water. See also a few rose-coloured spikes of the amphibious persicaria. [Illustration: YOUNG CRISTATELLA, MAGNIFIED.]