At the Commentary blog, "Contentions," Williams College art historian Michael J. Lewis weighs in on the Gross Clinic matter:
"[N]agging questions remain. One is the involvement of the National Gallery, which might be expected to defend the cause of American art as a whole, and not to act as a predatory corporation, aggrandizing itself at the cost of the cultural patrimony of another city. Another is the increasing tendency of private institutions to sell their cultural assets, declaring them, on the basis of narrowly formulated mission statements, to be 'outside the scope of our central mission.' Such was the case two years ago when the New York Public Library sold Asher Durand’s Kindred Spirits (1849), the iconic Hudson River School landscape, to the Crystal Bridges Museum. And finally, there is the Philadelphia Art Museum itself, which has eloquently defended the idea that the physical location of a work of art has much to do with its aesthetic force and social significance; it is striking that this is the same museum that has worked so assiduously to pry the collection of the Barnes Foundation from the building and site that have given it its meaning for three quarters of a century."
The latter point was also made by Christopher Knight in the LA Times a few days ago (see point 1).