Note P — Chapter XVII · Stage Tricks. (continued 2)

This is the principle of the well-known “second sight” trick, a detailed explanation of which we are compelled from considerations of space to omit, the system, as perfected by Robert-Houdin and others, being so elaborate, that an independent treatise would be needed to do it justice. An admirable account of the system, as applied to the French language, will be found in a work by F. A. Gandon, “La seconde vue dévoilée,” published in Paris in 1849.