""The Influence of Descartes on Metaphysical Speculation in England"" is a historical work written by William Cunningham and published in 1876. The book explores the impact of the French philosopher Ren����� Descartes on the development of metaphysical thought in England during the 17th and 18th centuries. Cunningham examines the reception of Descartes' ideas in England, including his famous ""Cogito, ergo sum""...