Walker, J. (1820). Elements of elocution: In which the principles of reading and speaking are investigated ... with directions for strengthening and modulating the voice ... to which is added, a complete system of the passions; showing how they effect the countenance, tone of voice, and gesture of the body, exemplified by a copious selection of the most striking passages of Shakespeare .. (The 6th ed.). T. Cadell and Davies.

Walker, John. Elements of Elocution: In Which the Principles of Reading and Speaking Are Investigated ... with Directions for Strengthening and Modulating the Voice ... to Which Is Added, a Complete System of the Passions; Showing How They Effect the Countenance, Tone of Voice, and Gesture of the Body, Exemplified by a Copious Selection of the Most Striking Passages of Shakespeare .. The 6th ed. T. Cadell and Davies, 1820.