No one, to my knowledge, has observed the minute differences in the seasons. Hardly two nights are alike. The rocks do not feel warm to-night, for the air is warmest; nor does the sand particularly. A book of the seasons, each page of which should be written in its own season and out-of-doors, or in its own locality wherever it may be. When you get into the road, though far from the town, and feel the sand under your feet, it is as if you had reached your own gravel walk. You no longer hear the whip-poor-will, nor regard your shadow, for here you expect a fellow-traveller. You catch yourself walking merely. The road leads your steps and thoughts alike to the town. You see only the path, and your thoughts wander from the objects which are presented to your senses. You are no longer in place. It is like conformity,—walking in the ways of men. In Charles Darwin’s “Voyage of a Naturalist round the World,” commenced in 1831:— He gave to Ehrenberg some of an impalpably fine dust which filled the air at sea near the Cape de Verd Islands, and he found it to consist in great part of “infusoria with siliceous shields, and of the siliceous tissue of plants;” found in this sixty-seven different organic forms. The infusoria with two exceptions inhabitants of fresh water. Vessels have even run on shore owing to the obscurity. Is seen a thousand miles from Africa. Darwin found particles of stone above a thousandth of an inch square. Speaking of St. Paul’s Rocks, Lat. 58´ N., Long. 29° 15´ W., “Not a single plant, not even a lichen, grows on this islet; yet it is inhabited by several insects and spiders. The following list completes, I believe, the terrestrial fauna: a fly (Olfersia) living on the booby, and a tick which must have come here as a parasite on the birds; a small brown moth, belonging to a genus that feeds on feathers; a beetle (Quedius), and a woodlouse from beneath the dung; and lastly numerous spiders, which I suppose prey on these small attendants and scavengers of the waterfowl. The often-repeated description of the stately palm and other noble tropical plants, then birds, and lastly man, taking possession of the coral islets as soon as formed, in the Pacific, is probably not quite correct; I fear it destroys the poetry of this story, that feather and dirt-feeding and parasitic insects and spiders should be the first inhabitants of newly-formed oceanic land.” At Bahia or San Salvador, Brazil, took shelter under a tree “so thick that it would never have been penetrated by common English rain,” but not so there.