Scope note: This class comprises periods of continuous activity of an Actor in a specific professional or creative domain or field. Examples: - Natalya Goncharova working as a set and costume designer, painter, illustrator and poet in Russia and France in the first half of the 20th century - Satyajit Ray working as a filmmaker, writer, composer and graphic designer in India in the second half of the 20th century - Folger Shakespeare Library in Washington studying the works of William Shakespeare - M. & N. Hanhart working in lithographic publishing (1839-1882)