Green trained under Robert Hancock , a Worcester engraver , after which he moved to London and began working as a mezzotint engraver .
Valentine Green ( October 3 , 1739 -- July 29 , 1813 ) was a British engraver and print publisher .
engraver trained under Robert Hancock , a Worcester engraver , after which Valentine Green moved to London and began working as a mezzotint engraver .
Valentine Green ( October 3 , 1739 -- July 29 , 1813 ) was a British engraver and print publisher .