Black shapes crouched, lay, sat between the trees, leaning against the trunks, clinging to the earth, half coming out, half effaced within the dim light, in all the attitudes of pain, abandonment, and despair.
There are no more uses of "efface" in the book.
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She always effaces herself when she is with him.
Your dear thoughts have now effaced That beauty that so won me at the outset.