This early work by Robin G. Collingwood was originally published in 1924 and we are now republishing it with a brand new introductory biography. 'Speculum Mentis' is an academic work on the subject of philosophy. Robin George Collingwood was born on 22nd February 1889, in Cartmel, England. He was the son of author, artist, and academic, W. G. Collingwood. He was greatly influenced by the Italian Idealists Croce, Gentile, and Guido de Ruggiero. Another important influence was his father, a professor of fine art and a student of Ruskin. He published many works of philosophy, such as Speculum Mentis (1924), An Essay on Philosophic Method (1933), and An Essay on Metaphysics (1940).