Here are the letters between Nelly Sachs (1891 - 1970), recipient of the 1966 Nobel Prize for Literature, and the great German-speaking poet Paul Celan (1920 - 1970). Their correspondence lasted from 1954 until Celan's death by suicide. Sachs died the day Celan was buried.
FROM THE BOOK
"Divide yourself night
both your irradiated wings
tremble with horror
for I will go
and bring you back the bloody evening"
-- from Nelly Sachs's last letter to Paul Celan