I know what my heart is like
Since your love died:
It is like a hollow ledge
Holding a little pool
Left there by the tide,
A little tepid pool,
Drying inward from the edge.

Edna St. Vincent Millay (1892-1950) American poet
“Ebb,” The Nation (UK), Vol. 27, No. 4 (1920-04-24)
    (Source)

Collected in Second April (1921).