Anonymous, The Practical Magician and Ventriloquist's Guide
“ The ventriloquist, therefore, by some means or other, acquires the difficult habit of contracting the field of sound within the compass of his lips, which enables him to confine the real path of his voice to narrow limits. For he who is master of his art has nothing to do but to place his mouth obliquely to the company, and to dart his words out of his mouth—if the expression may be used—whence they will then strike the ears of the audience as that from an unexpected quarter. ”
