Classic Poem

This is the gown which my fond readers know,
For oft I've sung its praises. Long ago
It was a poet's gift, Parthenian hight,
And in it clothed I walked a splendid knight.
Then it was new and worthy of its giver,
Its glossy wool as shining as a river.
To-day the meanest pauper would decline,
To wear it, 'tis indeed so " snow-flake fine."
What will not time and length of days destroy?
Your once grand gown is now like you, my boy.