"The great reason, I think, that all the world welcomes these travellers is, that they are such a happy, merry set of beings they make every one around them cheerful; their gayety is never-failing. They rise with the first streak of light; there are no sluggards among them. They are all musical, and sing as they go about their work; but their music pleases me best when they join in their morning hymn. When the morning star is growing pale, and rosy light tinges the edges of the soft clouds in the east, this choir of singers stop for a second, as if waiting, in silent reverence, for the glad light to appear; then, just as the first ray gilds the hill tops and the village spire, all pour forth a joyful song, swelling their little throats, and making such a loud noise that every sleepy head in the neighborhood awakes." "Ah! now I have caught you, Mother," said Frank; "these famous travellers are martins. I wonder, when you said they were not four footed, I did not think of martins. I heard George say, the other day, that his father had put up a martin box, and how they came and looked at it first, before they took it, and that they always sang before daylight, and what a noise they made. "But, Mother, when you tell that story again, you must not say little throats, or any one will know who your travellers are quick enough; but do please tell us more about them." "Yes, Frank, you have caught me; these travellers are martins; and, if you wish, I will tell you more about them. Mr. Wilson, whom I have been reading to-day, calls them birds of passage." "What does that mean, Mother?" "It means that they find it necessary for their support to pass from one country to another when winter is coming on. At that time they leave us. "Some people think that martins and swallows hide themselves from the cold in holes in rocks and banks, or in hollow trees; but Wilson, who spent many years in watching the habits of birds, and learning their history, thinks that these fly a great way off to a warmer country as winter approaches, and that they return again in the spring." "But how can they find the way?" asked Frank. "All that we know about that, Frank, is, that He who created the martins has given to them the knowledge that guides them right. In their long way through the pathless air, they never make a mistake. Our great vessels and our skilful captains sometimes get lost in the wide ocean; but these little birds always know the way, and arrive with unerring certainty at their place of destination. "Our great poet, Bryant, has written some beautiful lines to a water-fowl, which express this idea. I will repeat these lines to you if you like to hear them. 'Whither, 'midst falling dew, While glow the heavens with the last steps of day, Far, through their rosy depths, dost thou pursue Thy solitary way?