NATHAN, ISAAC. An Essay on the History and Theory of Music; and on the qualities, capabilities, and management of the human voice. London, 1823. 4to, old half calf and marbled boards, the leather renewed. FIRST EDITION. Roth, p. 421 (B20, no. 104). The Signet Library copy, gilt supra libros -- BYRON, G.G.N. Hebrew Melodies. London, 1815. 8vo, new half calf. FIRST EDITION. Roth, p. 404 (B19, no. 37) -- COWEN, ISAAC. The Sage. London, 1817. 8vo, new goatskin, leather a little soiled, last page dust stained. (3)