Whose dust is this, I asked, In this forgotten urn? And where this waste now lies What city rose of old? None knows; its name is lost; It was, and is no more: Gone like a wind that blew A thousand years ago! Its melancholy end Will be the end of all; For, as it passed away, The universe will pass! Its sole memorial Some ruined world, like ours; A solitary urn, Full of the dust of men! BIRDS OF THE NIGHT. There are numerous swarms of insects and many small quadrupeds, requiring partial darkness for their security, that come abroad only during the night or twilight. These would multiply almost without check, but that certain birds are formed with the power of seeing in the dark, and, on account of their partial blindness in the daytime, are forced by necessity to seek their food by night. Many species of insects are most active after dewfall,--such, especially, as spend a great portion of their lifetime in the air. Hence the very late hour at which Swallows retire to rest, the hour succeeding sunset providing them with a fuller repast than any other part of the day. No sooner has the Swallow disappeared, than the Whippoorwill and the Night-Jar come forth, to prey upon the larger kinds of aerial insects. The Bat, an animal of an antediluvian type, comes out at the same time, and assists in lessening these multitudinous swarms. The little Owls, though they pursue the larger beetles and moths, direct their efforts chiefly at the small quadrupeds that steal out in the early evening to nibble the tender herbs and grasses. Thus the night, except the hours of total darkness, is with many species of animals, though they pursue their objects with comparative stillness and silence, a period of general activity. In this sketch, I shall treat of the Birds of the Night under two heads, including, beside the true nocturnal birds that go abroad in the night to seek their subsistence, those diurnal birds that continue their songs during a considerable portion of the night. Some species of birds are partly nocturnal in their habits. Such is the Chimney Swallow. This bird is seldom out at noonday, which it employs in sleep, after excessive activity from the earliest morning dawn. It is seen afterwards circling about in the decline of day, and is sometimes abroad in fine weather the greater part of the night, when the young broods require almost unremitted exertions, on the part of the old birds, to procure their subsistence.