From a review by Will Blythe entitled Food for the Soul. of Returning to Earth by Jim Harrison.
Note how he records his family's history before he goes, so the memory is not lost.
In Donald’s opening monologue, a rambling family history for the benefit of his children, recorded by Cynthia, his wife and teenage sweetheart, Donald announces, “It seems I’m to leave the earth early but these things happen to people.” His mind remains clear while his body becomes “desiccated road kill,” as K puts it. Barely able to swallow, he must sniff rather than taste a final meal of barbecued pork ribs. However, Donald doesn’t rage against the dying of the light, nor indulge in the deathbed histrionics of Tolstoy’s Ivan Ilyich. Dying seems to strike him as no more an aberration than birds returning to their roost at dusk. His mortality evokes the sense of a man going home at twilight, of — echoing the book’s lovely title — returning to earth. A luminous, sad calm pervades this novel.
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Donald’s dignified death is of a piece with his life (my father, a doctor, once said that in his experience people died as they lived, in character right to the end).
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This regal suicide marks only the halfway point of “Returning to Earth.” The novel’s subject now becomes an absence; Donald’s survivors must learn to negotiate the hole left in them by his departure. ... In treating the raggedy contours of grief, Harrison shows no patience with that banality known as “closure.” “There’s much talk about ‘healing’ these days before the blood is dry on the pavement,” Donald’s brother-in-law, David, complains.