But our bird knew not of the free blue air,
He had lived in his cage, and his home was there :
No flight had he in the green wood flown —
He pined not for freedom he never had known !
If he had lived amid leaf and bough
It had been cruel to fetter him now ;
For I have seen a poor bird die,
And all for love of his native sky.
The Dead Robin - Traits and Trials of Early Life (1836)