Anatole de Montaiglon catalogued 400 engravings by Mellan,Montaiglon 1856, cited by Brejon de Lavergnée 1996. and about 100 drawings are known. The latter are mostly in the Stockholm Nationalmuseum (via the collection of Carl Gustav Tessin) and the Hermitage, Saint Petersburg (via the Cobenzl collection). Several of Mellan's lost paintings are known from his engravings of them, including Samson and Delilah (Préaud no. 5) and Saint John the Baptist in the Desert (Préaud no. 84). A few other paintings were attributed to him, beginning in the 1970s, but these have not been generally accepted.
