Mary Shepherd (1777-1847) became a well-known philosopher in Britain during the first half of the nineteenth century, making important contributions to metaphysics, epistemology, and philosophy of mind. She published two books: An Essay upon the Relation of Cause and Effect (1824) and Essays on the Perception of an External Universe (1827). Mary Shepherd's An Essay upon the Relation of Cause and Effect, first published in 1824, was a pioneering...