Poet William Blake portrait (1807) by Thomas Phillips at National Portrait Gallery. London, United Kingdom. | Chemist Sir Humphry Davy (noted for isolating several atomic elements) portrait (1821) by Thomas Phillips at National Portrait Gallery. London, United Kingdom. | Mary Somerville portrait (c1834) by Thomas Phillips at National Portrait Gallery of Scotland. Edinburgh, Scotland. | John Dalton (noted for theory of atomic behavior) portrait (1836) by Thomas Phillips at National Portrait Gallery. London, United Kingdom. |