The narrator leaves the shepherd and returns home, and later fights in the First World War. In 1920, shell-shocked and depressed after the war, the man returns. He is surprised to see young saplings of all forms taking root in the valley, and new streams running through it where the shepherd has made dams higher up in the mountain. The narrator makes a full recovery in the peace and beauty of the regrowing valley, and continues to visit Bouffier every year. Bouffier is no longer a shepherd, because he is worried about the sheep affecting his young trees, and has become a bee keeper instead.
Over four decades, Bouffier continues to plant trees, and the valley is turned into a kind of Garden of Eden. By the end of the story, the valley has a vibrant ecosystem and is peacefully settled. The valley receives official protection after the First World War. (the authorities mistakenly believe that the rapid growth of this forest is a bizarre natural phenomenon, as they are unaware of Bouffier's selfless deeds), and more than 10,000 people move there, all of them unknowingly owing their happiness to Bouffier. The narrator tells one of his friends in the government the truth about the natural forest, and the friend also helps protect the forest.
The narrator visits the now very old Bouffier one last time in 1945, at the end of World War II In a Hospice in Banon, in 1947, the man who planted trees peacefully passes away.
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