Thistledown in prison sings:

Bright shines the summer sun,
Soft is the summer air;
Gayly the wood-birds sing,
Flowers are blooming fair.
But, deep in the dark, cold rock,
Sadly I dwell,
Longing for thee, dear friend, 
Lily-Bell! Lily-Bell!

Lily-Bell replies:

Through sunlight and summer air
I have sought for thee long,
Guided by birds and flowers,
And now by thy song.

Thistledown! Thistledown!
O'er hill and dell
Hither to comfort thee
Comes Lily-Bell.