Reaching the mill, I hastened around the bend in the road. A little to the south of Arethusa’s Spring, and scarcely five feet to the left of the path, under some willows, I saw a dark, insignificant looking pool. Stooping down and touching the surface, I found it icy cold. This pool, Merwin’s mother tells me, has always been here, and at no time in her memory has she heard of any one being successful in measuring its depth, although it has been probed with very long sounding-poles. These have been dropped fifty feet or more. Frequently she has left a long pole standing in the pool, only to find upon returning later that it had disappeared in the depths below, proving great suction. Such holes and springs are characteristic of the swamps of Etchowog, where the original lake bed was located over a century ago, before the water of Ball Brook was turned in its course through the present pond west of the mill. This “dead hole” should be fenced in and marked “dangerous,” since it might so easily be stepped into by one unacquainted with its character. [Illustration: =The Rose Pogonia.= (_Pogonia ophioglossoides._) A delicate little orchid, found as comrade with the Grass Pink, and frequently with Arethusa, in wild sphagnous meadows.] I followed the familiar and loved path out to the sphagnous meadows east of Kimball’s barns. Taking a straight line southward up the hill, back of an orchard, along the border of a field of Indian corn, I came again to Thompson’s Brook, on its way to join Ball Brook, near the Kimball barns below. It is one of the stoniest channels, narrow and deeply worn, with here and there graceful clinging ferns slightly caught to the banks, and often completely hiding the huge boulders and ledges. Pines and hemlocks are the principal trees along this stream. The twisted and uncovered reddish roots of the hemlocks seemed to have split the black shelving slate rocks asunder with their growth. I threaded my way as near the brook as possible, often finding it necessary to wade in the stream until I reached the bend in the road near Meyers’s sugar-kitchen among the maples. Here, turning to my right, I followed the shaded road leading past the schoolhouse in District Fourteen, and homeward to Mount Œta. My orchids were pretty well withered on reaching home, and not in good condition for studying. These delicate species of Pogonia and Limodorum are easily wilted, losing their beauty and elasticity soon after being severed from their roots. These two species, Adder’s-Mouth Pogonia and _Limodorum tuberosum_, are almost invariably found together,—comrades of different genera that travel far and wide in company throughout their continental ranges.