Copyright and patents, or, Property in thought [electronic resource] : : being an investigation of the principles of legal science, applicable to property in thought : with their bearing on the case of Jefferys v. Boosey, recently decided by the House of Lords : in a letter to the Right Hon. Lord Brougham and Vaux : to which is appended a corrected report of the judgments delivered by the Lord Chancellor, Lord Brougham and Lord St. Leonards / by Montague R. Leverson