more or less hidden, their activity produced certain definite effects on the muscles of the face. These effects or pictures the student memorized, learning to associate each with its proper sound. Practice enabled the eye to follow the changing of one into the other, thus perceiving words and sentences. In this way, the adult was saved from spending many hours in studying articulative movements, and was put directly in communication with other persons. This invention made Warren at once a leader in her chosen work. She first spoke in public regarding the new method at a Chautauqua meeting in July, 1894. After the publication of Defective Speech and Deafness, the work of the school developed rapidly. She was also principal of the Warren Correspondence School. Warren was a member of the American association to promote the teaching of speech to the deaf. Writer Warren's book, Defective Speech and Deafness (Edgar S. Werner, New York, 1895), was well received. Professor Alexander Melville Bell, the inventor of Visible Speech, said of it:— "The work shows a complete mastery of the subject, and it cannot but prove directly valuable to parents and teachers." The scope of the book was comprehensive. It treated the deaf-mute and the stammerer; the very young deaf child; teaching the mute to speak: the child suddenly deaf and the child growing deaf slowly; how the hard-of-hearing adult may enjoy conversation; dullness of pupils owing to defective hearing; and lisping and careless speech in general. A review by The New York Times began with:— "This volume is written by one well versed not alone in theory, but one who has had many years of practical experience in teaching the deaf, but not necessarily dumb, how to speak." This book showed that fluent speech may be obtained and understood by those with the different phases of deafness and the different degrees of imperfect speech. It was not a textbook, but, in effect, an essay showing the importance of prompt attention in order that they may understand and make themselves understood in conversation. Among her other works was Warren Method Applied to French, German and Italian. The general address of European schools was, American & Colonial Exchange, Carlton Street, Regent Street, S. W., London. Inventor In 1903, Warren received patent #US726484A for "Means for Teaching the Reading of the Facial Expressions which Occur in Speaking". Filed in 1902, it claimed:— "An improved