Where the open trail skirted a hillside we came suddenly upon a great gathering of these goatsuckers, engaged in some strange midnight revel. Usually they roost and hunt and call in solitude, but here at least forty were collected on the white sand within an area of a few yards. We stopped and watched. They were dancing--or, rather, popping, as corn pops in a hopper. One after another, or a half dozen at a time, they bounced up a foot or two from the ground and flopped back, at the instant of leaving and returning uttering a sudden, explosive _wop!_ This they kept up unceasingly for the five minutes we gave to them, and our passage interrupted them for only a moment. Later we passed single birds which popped and wopped in solitary state; whether practicing, or snobbishly refusing to perform in public, only they could tell. It was a scene not soon forgotten. Suddenly before us rose the jungle, raw-edged, with border zone of bleached, ashamed trunks and lofty branches white as chalk, of dead and dying trees. For no jungle tree, however hardy, can withstand the blasting of violent sun after the veiling of emerald foliage is torn away. As the diver plunges beneath the waves, so, after one glance backward over the silvered landscape, I passed at a single stride into what seemed by contrast inky blackness, relieved by the trail ahead, which showed as does a ray of light through closed eyelids. As the chirruping rails climbed among the roots of the tall cat-tails out yonder, so we now crept far beneath the level of the moonlit foliage. The silvery landscape had been shifted one hundred, two hundred feet above the earth. We had become lords of creation in name alone, threading our way humbly among the fungi and toad-stools, able only to look aloft and wonder what it was like. And for a long time no voice answered to tell us whether any creature lived and moved in the tree-tops. The tropical jungle by day is the most wonderful place in the world. At night I am sure it is the most weirdly beautiful of all places outside the world. For it is primarily unearthly, unreal; and at last I came to know why. In the light of the full moon it was rejuvenated. The simile of theatrical scenery was always present to the mind, the illusion lying especially in the completeness of transformation from the jungle by daylight. The theatrical effect was heightened by the sense of being in some vast building. This was due to the complete absence of any breath of air. Not a leaf moved; even the pendulous air-roots reaching down their seventy-foot plummets for the touch of soil did not sway a hair’s breadth. The throb of the pulse set the rhythm for one’s steps. The silence, for a time, was as perfect as the breathlessness. It was a wonderfully ventilated amphitheatre; the air was as free from any feeling of tropical heat, as it lacked all crispness of the north. It was exactly the temperature of one’s skin. Heat and cold were for the moment as unthinkable as wind.