Slide Mountain enjoys a distinction which no other mountain in the State, so far as is known, does, – it has a thrush peculiar to itself. This thrush was discovered and described by Eugene P. Bicknell, of New York, in 1880, and has been named Bicknell's thrush. A better name would have been Slide Mountain thrush, as the bird so far has only been found on the mountain.4 I did not see or hear it upon the Wittenberg, which is only a few miles distant, and only two hundred feet lower. In its appearance to the eye among the trees, one would not distinguish it from the gray-cheeked thrush of Baird, or the olive-backed thrush, but its song is totally different. The moment I heard it I said, "There is a new bird, a new thrush," as the quality of all thrush songs is the same. A moment more, and I knew it was Bicknell's thrush. The song is in a minor key, finer, more attenuated, and more under the breath than that of any other thrush. It seemed as if the bird was blowing in a delicate, slender, golden tube, so fine and yet so flute-like and resonant the song appeared. At times it was like a musical whisper of great sweetness and power. The birds were numerous about the summit, but we saw them nowhere else. No other thrush was seen, though a few times during our stay I caught a mere echo of the hermit's song far down the mountain-side. A bird I was not prepared to see or hear was the black-poll warbler, a bird usually found much farther north, but here it was, amid the balsam firs, uttering its simple, lisping song.
The rocks on the tops of these mountains are quite sure to attract one's attention, even if he have no eye for such things. They are masses of light reddish conglomerate, composed of round wave-worn quartz pebbles. Every pebble had been shaped and polished upon some ancient seacoast, probably the Devonian. The rock disintegrates where it is most exposed to the weather, and forms a loose sandy and pebbly soil. These rocks form the floor of the coal formation, but in the Catskill region only the floor remains; the superstructure has never existed, or has been swept away; hence one would look for a coal mine here over his head in the air, rather than under his feet.
This rock did not have to climb up here as we did; the mountain stooped and took it upon its back in the bottom of the old seas, and then got lifted up again. This happened so long ago that the memory of the oldest inhabitant of these parts yields no clue to the time.
A pleasant task we had in reflooring and reroofing the log-hut with balsam boughs against the night. Plenty of small balsams grew all about, and we soon had a huge pile of their branches in the old hut. What a transformation, this fresh green carpet and our fragrant bed, like the deep-furred robe of some huge animal wrought in that dingy interior! Two or three things disturbed our sleep. A cup of strong beef-tea taken for supper disturbed mine; then the porcupines kept up such a grunting and chattering near our heads, just on the other side of the log, that sleep was difficult. In my wakeful mood I was a good deal annoyed by a little rabbit that kept whipping in at our dilapidated door and nibbling at our bread and hardtack. He persisted even after the gray of the morning appeared. Then about four o'clock it began gently to rain. I think I heard the first drop that fell. My companions were all in sound sleep. The rain increased, and gradually the sleepers awoke. It was like the tread of an advancing enemy which every ear had been expecting. The roof over us was of the poorest, and we had no confidence in it. It was made of the thin bark of spruce and balsam, and was full of hollows and depressions. Presently these hollows got full of water, when there was a simultaneous downpour of bigger and lesser rills upon the sleepers beneath. Said sleepers, as one man, sprang up, each taking his blanket with him; but by the time some of the party had got themselves stowed away under the adjacent rock, the rain ceased. It was little more than the dissolving of the nightcap of fog which so often hangs about these heights. With the first appearance of the dawn I had heard the new thrush in the scattered trees near the hut, – a strain as fine as if blown upon a fairy flute, a suppressed musical whisper from out the tops of the dark spruces. Probably never did there go up from the top of a great mountain a smaller song to greet the day, albeit it was of the purest harmony. It seemed to have in a more marked degree the quality of interior reverberation than any other thrush song I had ever heard. Would the altitude or the situation account for its minor key? Loudness would avail little in such a place. Sounds are not far heard on a mountain-top; they are lost in the abyss of vacant air. But amid these low, dense, dark spruces, which make a sort of canopied privacy of every square rod of ground, what could be more in keeping than this delicate musical whisper? It was but the soft hum of the balsams, interpreted and embodied in a bird's voice.
It was the plan of two of our companions to go from Slide over into the head of the Rondout, and thence out to the railroad at the little village of Shokan, an unknown way to them, involving nearly an all-day pull the first day through a pathless wilderness. We ascended to the topmost floor of the tower, and from my knowledge of the topography of the country I pointed out to them their course, and where the valley of the Rondout must lie. The vast stretch of woods, when it came into view from under the foot of Slide, seemed from our point of view very uniform. It swept away to the southeast, rising gently toward the ridge that separates Lone Mountain from Peak-o'-Moose, and presented a comparatively easy problem. As a clue to the course, the line where the dark belt or saddle-cloth of spruce, which covered the top of the ridge they were to skirt, ended, and the deciduous woods began, a sharp, well-defined line was pointed out as the course to be followed. It led straight to the top of the broad level-backed ridge which connected two higher peaks, and immediately behind which lay the headwaters of the Rondout. Having studied the map thoroughly, and possessed themselves of the points, they rolled up their blankets about nine o'clock, and were off, my friend and myself purposing to spend yet another day and night on Slide. As our friends plunged down into that fearful abyss, we shouted to them the old classic caution, "Be bold, be bold, be not too bold." It required courage to make such a leap into the unknown, as I knew those young men were making, and it required prudence. A faint heart or a bewildered head, and serious consequences might have resulted. The theory of a thing is so much easier than the practice! The theory is in the air, the practice is in the woods; the eye, the thought, travel easily where the foot halts and stumbles. However, our friends made the theory and the fact coincide; they kept the dividing line between the spruce and the birches, and passed over the ridge into the valley safely; but they were torn and bruised and wet by the showers, and made the last few miles of their journey on will and pluck alone, their last pound of positive strength having been exhausted in making the descent through the chaos of rocks and logs into the head of the valley. In such emergencies one overdraws his account; he travels on the credit of the strength he expects to gain when he gets his dinner and some sleep. Unless one has made such a trip himself (and I have several times in my life), he can form but a faint idea what it is like, – what a trial it is to the body, and what a trial it is to the mind. You are fighting a battle with an enemy in ambush. How those miles and leagues which your feet must compass lie hidden there in that wilderness; how they seem to multiply themselves; how they are fortified with logs, and rocks, and fallen trees; how they take refuge in deep gullies, and skulk behind unexpected eminences! Your body not only feels the fatigue of the battle, your mind feels the strain of the undertaking; you may miss your mark; the mountains may outmanœuvre you. All that day, whenever I looked upon that treacherous wilderness, I thought with misgivings of those two friends groping their way there, and would have given something to have known how it fared with them. Their concern was probably less than my own, because they were more ignorant of what was before them. Then there was just a slight shadow of a fear in my mind that I might have been in error about some points of the geography I had pointed out to them. But all was well, and the victory was won according to the campaign which I had planned. When we saluted our friends upon their own doorstep a week afterward, the wounds were nearly all healed and the rents all mended.
When one is on a mountain-top, he spends most of the time in looking at the show he has been at such pains to see. About every hour we would ascend the rude lookout to take a fresh observation. With a glass I could see my native hills forty miles away to the northwest. I was now upon the back of the horse, yea, upon the highest point of his shoulders, which had so many times attracted my attention as a boy. We could look along his balsam-covered back to his rump, from which the eye glanced away down into the forests of the Neversink, and on the other hand plump down into the gulf where his head was grazing or drinking. During the day there was a grand procession of thunder-clouds filing along over the northern Catskills, and letting down veils of rain and enveloping