Viewing Francis B. Tiffany: "Handbook of The Law of Principal And Agent." (1903).
Francis Buchanan Tiffany, a St. Paul lawyer and a founder of the St. Paul College of Law, wrote several treatises in the 1890s and early 1900s. His hornbook on the law of principal and agent was published by West Publishing Company of St. Paul in 1903, and a second edition followed in 1908. The first edition of Tiffany's hornbook is posted here.