As we crossed the marsh, I heard the song of the olive-backed thrush, which sounds to me like a cross between the notes of the wood thrush and the strange harp-chords of the veery or Wilson thrush. In another part of the bog sang the rare Nashville warbler, whose nest we have yet to find. Its song starts like the creak of the black-and-white warbler and ends like a chipping sparrow. In a marsh beyond the sphagnum bog, I found the nest of a Maryland yellowthroat, set in a yellow viburnum shrub some six inches from the ground. This nest is usually on the ground. It was set just as a gem is set in a ring, the setting consisting of leaves which come up into five or six points. Held by the points is a little cup of grass. The eggs were the most beautiful we saw that day--of a pinkish-white with a wreath of chestnut blotches around the larger end. On the farther side of the marsh, a white-throated sparrow flew out from in front of me; and after a long search I found its nest--a little moss-rimmed cup of gray-green, yellow grass, containing four eggs of a faint blue clouded with chestnut, which was massed in large blotches at the larger end. With the four eggs was a dumpy young cow-bird, that fatal changeling which is the death of so many little birds. In this case we saved four prospective white-throated sparrows from being starved to death by their ugly foster-brother. The white-throat is a dear, gentle, little bird. Even its alarm-notes are soft, instead of being harsh and disagreeable like those of most other sparrows. The next day I found a song sparrow's nest and a catbird's nest, and then in the midst of dark, cool woods, where an icy brown trout-brook ran through a mass of rhododendron, a thrush suddenly slipped away ahead of me out of a clump of rhododendron bushes. The light color of the bird and the lighter spotted breast marked it as a veery or Wilson thrush. On looking at the bush, I saw the nest, a rough one made of hemlock twigs matted together, and lined with pine-needles with a basis of leaves. Inside were four small eggs of a heavenly blue. They are among the smallest of all of our pure-blue eggs. That same day the Artist found a beautiful nest of a black-throated-blue warbler, also set in a rhododendron bush. The nest was made of the light inner bark of the rhododendron, which was of a bright yellow. Inside, it was lined with black and tan rootlets so fine that they look almost like horse-hair. These are the same rootlets which the magnolia warbler uses to line its nest, and up to the present time no ornithologist whom I have met has been able to identify them. * * * * * "Can you go to Maryland to-day on a bird-trip?" telephoned the Banker. "No," said I, "lawyers have to work for a living." "There'll be blue-gray gnatcatchers and mocking-birds and Acadian flycatchers," he tried again. "No," said I. "I've found out where the prothonotary warbler lives," he said once more. "No," said I.