The Weaver of Silks and Shadows In the golden age of colonial portraiture, few hands possessed the delicate precision required to capture the ephemeral shimmer of a silk gown or the intricate lace of a gentleman’s cravat quite like Joseph Blackburn. An itinerant master whose brush traveled across the Atlantic, Blackburn was far more and more than a mere recorder of faces; he was a virtuoso of texture. To gaze upon his work is to witne…