_Mrs. B._ Although the shaft of a chimney is the place of which they usually make choice for this purpose, they sometimes vary their plan. In Sir Ashton Lever's Museum, was the nest of a swallow built on the wings and body of an owl, which happened, by accident, to hang dead and dry from the rafter of a barn; and another in a large shell, which was, the following year, suspended in the same place. You have, no doubt, my dear children, all observed vast flocks of swallows assemble together on the roofs of houses; they chirp, and chatter, and seem very busy, preparing for their ensuing migration, and consulting, as it were, upon the plan most proper to be adopted on this occasion. I have often wished, at such times, that I could understand their language. There is seldom one of these birds to be seen after the middle of October; but to what regions they fly, we do not exactly know; though I read, in Dr. Russel's account of Aleppo, that numbers of these birds visit that country towards the end of February, when they build as in Europe, and, having hatched their young, disappear about the end of July. They are also said to be by no means uncommon North America. Sir Charles Wager and Captain Wright, saw vast flocks of them at sea, when on their passage from one country another. White, in a pretty little poem, which he calls "The Naturalist's Summer Evening Walk," addresses them as follows: "Amusive birds! say where your hid retreat, When the frost rages, and the tempests beat; Whence your return, by such nice instinct led, When spring, soft season, lifts her bloomy head? Such baffled searches mock man's prying pride, The God of nature is your secret guide." Professor Kahn, in his travels into America, relates an interesting anecdote, of a pair of swallows which built their nest in a stable belonging to a lady of his acquaintance. The female laid her eggs, and was about to brood them: some days elapsed, and the people saw the female still sitting on the eggs, but the male, flying about the nest, and sometimes settling on a nail, was herd to utter a very plaintive note, which betrayed his uneasiness. On a nearer examination the female was found dead on the nest, and, on her being removed, the male took his seat upon the eggs; but after remaining upon them about two hours, he went out, and returned in the afternoon, bringing with him another female, which sat upon the nest, and afterwards fed the young ones till they were able to provide for themselves, with as much assiduity and kindness as their natural parent could have done. The children were all much interested in the account which their mother had given them, and united in requesting some information respecting the other species of _hirundines_. This, Mrs. Bernard most willingly gave them, as follows: