an Entity references as follows:
Charles Meryon (sometimes Méryon, 23 November 1821 – 14 February 1868) was a French artist who worked almost entirely in etching, as he had colour blindness. Although now little-known in the English-speaking world, he is generally recognised as the most significant etcher of 19th century France. His most famous works are a series of views powerfully conveying his distinctive Gothic vision of Paris. He also had mental illness, dying in an asylum.