Scull is probably the most thorough and readable historian of madness since the death of the late, great Roy Porter, and this article is no exception.
Modern psychiatry seems determined to rob madness of its meanings, insisting that its depredations can be reduced to biology and nothing but biology. One must doubt it. The social and cultural dimensions of mental disorders, so indispensable a part of the story of madness and civilization over the centuries, are unlikely to melt away, or to prove no more than an epiphenomenal feature of so universal a feature of human existence. Madness indeed has its meanings, elusive and evanescent as our attempts to capture them have been.
By the way, most of the illustrations in the web article seem to be clickable for high resolution full screen versions, so you can see them in full detail.
Link to Madness and Meaning in Paris Review.