Painted in the Yellow House, Sept. 1888, Arles. http://eugeneboch.com/portrait/, http://art-vangogh.com/arles_102.html
Van Gogh met Belgian painter Eugène Boch in mid-June 1888.... Letter to Théo: "I very much like the looks of this young man with his distinctive face, like a razor blade, and his green eyes."..."I should like to paint the portrait of an artist friend, a man who dreams great dreams, who works like the nightingale sings, because it is his nature to do so. This man will be blond. I would like to convey in the picture my appreciation, the love that I have for him.... Although he only considered it to be a "sketch", Van Gogh framed this work, which he called The Poet. We know that it hung for some time on the wall of his bedroom in the Yellow House, because it appears in the first version of The Bedroom (http://arthistoryproject.com/artists/vincent-van-gogh/portrait-of-eugene-boch/)
Boch's sister Anna bought The Red Vineyard, the only work Van Gogh ever sold.