The mezzotint of Cotton Mather, made in 1727, sold for two shillings.
I never said that mezzotint ignored light and shade, or ought to do so.
Mezzotint is properly to be considered as chiaroscuro drawing on metal.
The edge of the mouth is defined by a mezzotint at the point of union.
Several of his portraits he engraved with his own hand in line and mezzotint.