There is so much peace
To be found in the quiet space
The gloom that we fear in solitude
Calm that resounds with gray
A heart built atop a quiet place.
Breathing through heavy air.
Heaving burdens through time.
Nostalgia felt within déjà...
Which female American poet, who was little-known during her lifetime, but had nearly 1800 of her poems published posthumously, rarely titled her poems?