The kingfisher seems as much a familiar of the place as the echoes. Like them he flies back and forth from shore to shore till you wonder whether he is trying to keep pace with them or whether he is the embodiment of one that does not need to be set going by a word but has volition of its own. The kingfisher’s voice hardly seems to belong at Walden, it is so harsh and unlovely. Even in this very school of sweet echoes it has learned neither modulation nor singing quality. Far different is the gentle peet-weet of the sandpipers which precede you along shore in scalloped flight. Something of the bright sweetness of the hedge hyssop strolls along the moist stones of the margin with them, as if the two became yearly more and more related. Each fall I think the olive-fuscous backs of these little birds get just a little more of a golden tinge from this continual neighboring with the equally gentle, friendly Gratiola aurea. If in return some fine summer the hedge hyssop should blossom into twittering song no one need be terribly surprised. [Illustration: “Walden is Walden still, very much as Thoreau painted it.”] In contrast to the fearless rattle of the kingfisher as he echoed from shore to shore and to the twittering, friendly sandpipers who ran so fearlessly along the margin, was the single little green heron that has made the pond his abiding place for a while. There is but one, nor are there any signs that herons have nested about the pond this year, so I fancy this bird is a bachelor visitor seeking to reduce living to its lowest terms and finding on the Walden shore the simplicity and seclusion that is the spirit of the place. He is as taciturn and patient as any hermit could be. When his country seat on one shore is invaded he simply flies silently to another and there resumes that inward contemplation which is as characteristic of the bird as the rattling, vibrating flight is of the kingfisher. The little green heron was a recluse of the pond shore long before the first pioneer planted his cabin in Concord. His kin still cling to the place which is as lovely and lonely now as it was then.