In The Days That Are Forgotten

No, you don't understand, naturally said the second swallow. First, we feel it stirring within us, a sweet unrest; then back come the recollections one by one, like homing pigeons. They flutter through our dreams at night, they fly with us in our wheelings and circlings by day. We hunger to inquire of each other, to compare notes and assure ourselves that it was all really true, as one by one the scents and sounds and names of long-forgotten places come gradually back and beckon to us.

Laurie Anderson: Hiawatha

I tried stopping one year, said the third swallow. I had grown so fond of the place that when the time came I hung back and let the others go on without me. For a few weeks it was all well enough, but afterwards, O the weary length of the nights! The shivering, sunless days! The air so clammy and chill, and not an insect in an acre of it! No, it was no good; my courage broke down, and one cold, stormy night I took wing, flying well inland on account of the strong easterly gales. It was snowing hard as I beat through the passes of the great mountains, and I had a stiff fight to win through; but never shall I forget the blissful feeling of the hot sun again on my back as I sped down to the lakes that lay so blue and placid below me, and the taste of my first fat insect. The past was like a bad dream; the future was all happy holiday.

--Kenneth Grahame
The Wind in the Willows