Impromptu, in Reply to a Friend

When, from the heart where Sorrow sits,
Her dusky shadow mounts too high,
And o'er the changing aspect flits,
And clouds the brow, or fills the eye;
Heed not that gloom, which soon shall sink:
My Thoughts their dungeon know too well;
Back to my breast the Wanderers shrink,
And _droop_ within their silent cell.