An experienced Cameo engraver recommends a beginner to procure pieces of Pumice-stone, which may be readily obtained, and begin by carving in this substance. The stone is much softer than the shell, and can be very easily shaped; and the colour lends itself to very beautiful effects, but the surface being very soft, the fine work soon disappears. As an intermediate step to the carving on the Conch-shell, the Pumice-stone may be strongly recommended.