Classic Poem

Twenty years hence my eyes may grow
If not quite dim, yet rather so,
Still yours from others they shall know
Twenty years hence.
Twenty years hence tho' it may hap
That I be call'd to take a nap
In a cool cell where thunder-clap
Was never heard,
There breathe but o'er my arch of grass
A not too sadly sigh'd Alas,
And I shall catch, ere you can pass,
That winged word.