What location did Van Gogh and George Hendrick sketch at ?
"" Bernard 's style was effective and coherent ( see:woman at haystacks , ) as can also be seen from the comparison of the two " portraits " Bernard and Gauguin sent to van Gogh at the end of September 1888 at the latter 's request : self-portraits - at Gauguin 's initiative - each integrating a small portrait of the other in the background .