Cornelius Johnson (1593-1661) was a sympathetic and expressive painter, and it is surprising that he has not previously been the subject of a focused study. The quality and diversity of this currently little-known artist's work will be a revelation. He worked on every scale - from the miniature to the full-length and big group portrait. His works, while always recognizably by him, reveal his exceptional flexibility and underline his response to successive influences. Johnson's career coincided with one of the most dramatically and politically intense periods of British and Dutch history, as...