persons speak with an air of positiveness, and doubtless ought to know whereof they affirm. Hath not a Bostonian eyes? And doth he not cross the Common every day? But it is proverbially hard to prove a negative; and some of us, with no thought of being cynical, have ceased to put unqualified trust in other people's eyesight,—especially since we have found our own to fall a little short of absolute infallibility. My own vision, by the way, is reasonably good, if I may say so; at any rate I am not stone-blind. Yet here have I been perambulating the Public Garden for an indefinite period, without seeing the first trace of a field-mouse or a shrew. I should have been in excellent company had I begun long ago to maintain that no such animals exist within our precincts. But the other day a butcher-bird made us a flying call, and almost the first thing he did was to catch one of these same furry dainties and spit it upon a thorn, where anon I found him devouring it. I would not appear to boast; but really, when I saw what Collurio had done, it did not so much as occur to me to quarrel with him because he had discovered in half an hour what I had overlooked for ten years. On the contrary I hastened to pay him a heart-felt compliment upon his indisputable sagacity and keenness as a natural historian;—a measure of magnanimity easily enough afforded, since however the shrike might excel me at one point, there could be no question on the whole of my immeasurable superiority. And I cherish the hope that my fellow townsmen, who, as they insist, never themselves see any birds whatever in the Garden and Common (their attention being taken up with matters more important), may be disposed to exercise a similar forbearance toward me, when I modestly profess that within the last seven or eight years I have watched there some thousands of specimens, representing not far from seventy species.

Of course the principal part of all the birds to be found in such a place are transient visitors merely. In the long spring and autumn journeys it will all the time be happening that more or less of the travelers alight here for rest and refreshment. Now it is only a straggler or two; now a considerable flock of some one species; and now a miscellaneous collection of perhaps a dozen sorts.

One of the first things to strike the observer is the uniformity with which such pilgrims arrive during the night. He goes his rounds late in the afternoon, and there is, no sign of anything unusual; but the next morning the grounds are populous,—thrushes, finches, warblers, and what not. And as they come in the dark, so also do they go away again. With rare exceptions you may follow them up never so closely, and they will do nothing more than fly from tree to tree, or out of one clump of shrubbery into another. Once in a great while, under some special provocation, they threaten a longer flight; but on getting high enough to see the unbroken array of roofs, on every side they speedily grow confused, and after a few shiftings of their course dive hurriedly into the nearest tree. It was a mistake their stopping here in the first place; but once here, there is nothing for it save to put up with the discomforts of the situation till after sunset. Then, please heaven, they will be off, praying never to find themselves again in such a Babel.

That most of our smaller birds migrate by night is by this time too well established to need corroboration; but if the student wishes to assure himself of the fact at first hand, he may easily do it by one or two seasons' observations in our Common,—or, I suppose, in any like inclosure. And if he be blest with an ornithologically educated ear, he may still further confirm his faith by standing on Beacon Hill in the evening—as I myself have often done—and listening to the chips of warblers, or the tseeps of sparrows, as these little wanderers, hour after hour, pass through the darkness over the city. Why the birds follow this plan, what advantages they gain or what perils they avoid by making their flight nocturnal, is a question with which our inquisitive friend will perhaps find greater difficulty. I should be glad, for one, to hear his explanation.

As a rule, our visitors tarry with us for two or three days; at least I have noticed that to be true in many cases where their numbers, or size, or rarity made it possible to be reasonably certain when the arrival and departure took place; and in so very limited a field it is of course comparatively easy to keep track of the same individual during his stay, and, so to speak, become acquainted with him. I remember with interest several such acquaintanceships.

One of these was with a yellow-bellied woodpecker, the first I had ever seen. He made his appearance one morning in October, along with a company of chickadees and other birds, and at once took up his quarters on a maple-tree near the Ether monument. I watched his movements for some time, and at noon, happening to be in the same place again, found him still there. And there he remained four days. I went to look at him several times daily, and almost always found him either on the maple or on a tulip tree a few yards distant. Without question the sweetness of maple sap was known to Sphyropicus varius long before our human ancestors discovered it, and this particular bird, to judge from his actions, must have been a genuine connoisseur; at all events he seemed to recognize our Boston tree as of a sort not to be met with every day, although to my less critical sense it was nothing but an ordinary specimen of the common Acer dasycarpum. He was extremely industrious, as is the custom of his family, and paid no attention to the children playing about, or to the men who sat under his tree, with the back of their seat resting against the trunk. As for the children's noise, he likely enough enjoyed it; for he is a noisy fellow himself and famous as a drummer. An aged clergyman in Washington told me—in accents half pathetic, half revengeful—that at a certain time of the year he could scarcely read his Bible on Sunday mornings, because of the racket which this woodpecker made hammering on the tin roof overhead.

Another of my acquaintances was of a very different type, a female Maryland yellow-throat. This lovely creature, a most exquisite, dainty bit of bird flesh, was in the Garden all by herself on the 6th of October, when the great majority of her relatives must have been already well on their way toward the sunny South. She appeared to be perfectly contented, and allowed me to watch her closely, only scolding mildly now and then when I became too inquisitive. How I did admire her bravery and peace of mind; feeding so quietly, with that long, lonesome journey before her, and the cold weather coming on! No wonder the Great Teacher pointed his lesson of trust with the injunction, "Behold the fowls of the air."

A passenger even worse belated than this warbler was a chipping sparrow that I found hopping about the edge of the Beacon Street Mall on the 6th of December, seven or eight weeks after all chippers were supposed to be south of Mason and Dixon's line. Some accident had detained him doubtless; but he showed no signs of worry or haste, as I walked round him, scrutinizing every feather, lest he should be some tree sparrow traveling in disguise.

There is not much to attract birds to the Common in the winter, since we offer them neither evergreens for shelter nor weed patches for a granary. I said to one of the gardeners that I thought it a pity, on this account, that some of the plants, especially the zinnias and marigolds, were not left to go to seed. A little untidiness, in so good a cause, could hardly be taken