Classic Poem

I saw about her spotless wrist,
Of blackest silk, a curious twist;
Which, circumvolving gently, there
Enthrall'd her arm as prisoner.
Dark was the jail, but as if light
Had met t'engender with the night;
Or so as darkness made a stay
To show at once both night and day.
One fancy more! but if there be
Such freedom in captivity,
I beg of Love that ever I
May in like chains of darkness lie.