Every farmer and fox-hunter would smile if he read Thoreau's statement, made in his paper on the natural history of Massachusetts, that "when the snow lies light and but five or six inches deep, you may give chase and come up with the fox on foot." Evidently Thoreau had never tried it. With a foot and a half, or two feet of snow on the ground, and traveling on snowshoes, you might force a fox to take to his hole, but you would not come up to him. In four or five feet of soft snow hunters come up with the deer, and ride on their backs for amusement, but I doubt if a red fox ever ventures out in such a depth of snow. In one of his May walks in 1860, Thoreau sees the trail of the musquash in the mud along the river-bottoms, and he is taken by the fancy that, as our roads and city streets often follow the early tracks of the cow, so "rivers in another period follow the trail of the musquash." As if the river was not there before the musquash was!

Again, his mysterious "night warbler," to which he so often alludes, was one of our common everyday birds which most school-children know, namely, the oven-bird, or wood-accentor, yet to Thoreau it was a sort of phantom bird upon which his imagination loved to dwell. Emerson told him he must beware of finding and booking it, lest life should have nothing more to show him. But how such a haunter of woods escaped identifying the bird is a puzzle.

In his walks in the Maine woods Thoreau failed to discriminate the song of the hermit thrush from that of the wood thrush. The melody, no doubt, went to his heart, and that was enough. Though he sauntered through orchards and rested under apple trees, he never observed that the rings of small holes in the bark were usually made by the yellow-bellied woodpecker, instead of by Downy, and that the bird was not searching for grubs or insects, but was feeding upon the milky cambium layer of the inner bark.

But Thoreau's little slips of the kind I have called attention to count as nothing against the rich harvest of natural-history notes with which his work abounds. He could describe bird-songs and animal behavior and give these things their right emphasis in the life of the landscape as no other New England writer has done. His account of the battle of the ants in Walden atones an hundred-fold for the lapses I have mentioned.

One wonders just what Thoreau means when he says in "Walden," in telling of his visit to "Baker Farm": "Once it chanced that I stood in the very abutment of a rainbow's arch, which filled the lower stratum of the atmosphere, tinging the grass and leaves around, and dazzling me as if I looked through colored crystal." Is it possible, then, to reach the end of the rainbow? Why did he not dig for the pot of gold that is buried there? How he could be aware that he was standing at the foot of one leg of the glowing arch is to me a mystery. When I see a rainbow, it is always immediately in front of me. I am standing exactly between the highest point of the arch and the sun, and the laws of optics ordain that it can be seen in no other way. You can never see a rainbow at an angle. It always faces you squarely. Hence no two persons see exactly the same bow, because no two persons can occupy exactly the same place at the same time. The bow you see is directed to you alone. Move to the right or the left, and it moves as fast as you do. You cannot flank it or reach its end. It is about the most subtle and significant phenomenon that everyday Nature presents to us. Unapproachable as a spirit, like a visitant from another world, yet the creation of the familiar sun and rain!

How Thoreau found himself standing in the bow's abutment will always remain a puzzle to me. Observers standing on high mountains with the sun low in the west have seen the bow as a complete circle. This one can understand.

We can point many a moral and adorn many a tale with Thoreau's shortcomings and failures in his treatment of nature themes. Channing quotes him as saying that sometimes "you must see with the inside of your eye." I think that Thoreau saw, or tried to see, with the inside of his eye too often. He does not always see correctly, and many times he sees more of Thoreau than he does of the nature he assumes to be looking at. Truly it is "needless to travel for wonders," but the wonderful is not one with the fantastic or the far-fetched. Forcible expression, as I have said, was his ruling passion as a writer. Only when he is free from its thrall, which in his best moments he surely is, does he write well. When he can forget Thoreau and remember only nature, we get those delightful descriptions and reflections in "Walden." When he goes to the Maine woods or to Cape Cod or to Canada, he leaves all his fantastic rhetoric behind him and gives us sane and refreshing books. In his walks with Channing one suspects he often let himself go to all lengths, did his best to turn the world inside out, as he did at times in his Journals, for his own edification and that of his wondering disciple.

To see analogies and resemblances everywhere is the gift of genius, but to see a resemblance to volcanoes in the hubs or gnarls on birch or beech trees, or cathedral windows in the dead leaves of the andromeda in January, or a suggestion of Teneriffe in a stone-heap, does not indicate genius. To see the great in the little, or the whole of Nature in any of her parts, is the poet's gift, but to ask, after seeing the andropogon grass, "Are there no purple reflections from the culms of thought in my mind?"—a remark which Channing quotes as very significant—is not to be poetical. Thoreau is full of these impossible and fantastic comparisons, thinking only of striking expressions and not at all about the truth. "The flowing of the sap under the dull rind of the trees" is suggestive, but what suggestion is there in the remark, "May I ever be in as good spirits as a willow"? The mood of the scrub oak was more habitual with him.

Thoreau was in no sense an interpreter of nature; he did not draw out its meanings or seize upon and develop its more significant phases. Seldom does he relate what he sees or thinks to the universal human heart and mind. He has rare power of description, but is very limited in his power to translate the facts and movements of nature into human emotion. His passage on the northern lights, which Channing quotes from the Journals, is a good sample of his failure in this respect:

Now the fire in the north increases wonderfully, not shooting up so much as creeping along, like a fire on the mountains of the north seen afar in the night. The Hyperborean gods are burning brush, and it spread, and all the hoes in heaven couldn't stop it. It spread from west to east over the crescent hill. Like a vast fiery worm it lay across the northern sky, broken into many pieces; and each piece, with rainbow colors skirting it, strove to advance itself toward the east, worm-like, on its own annular muscles. It has spread into their choicest wood-lots. Now it shoots up like a single solitary watch-fire or burning bush, or where it ran up a pine tree like powder, and still it continues to gleam here and there like a fat stump in the burning, and is reflected in the water. And now I see the gods by great exertions have got it under, and the stars have come out without fear, in peace.