(10) Knortz, Karl. _Amerikanische Redensarten und Volksgebräuche._ Leipzig, 1907. (11) Letzner, Karl. _Wörterbuch der englischen Volkssprache Australiens und der englischen Mischsprachen._ Halle, 1891. (12) Pettman, Charles. _Africanderisms._ A glossary of South African colloquial words and phrases and of place and other names. London and New York, 1913. (13) Ralph, Julian. "The Language of the Tenement-Folk," _Harper's Weekly_, XLI (Jan. 23, 1897), 90. (14) Skeat, Walter W. _English Dialects from the Eighth Century to the Present Day_. Cambridge, 1911. (15) Yule, Henry, and Burnell, A. C. _Hobson-Jobson._ A glossary of colloquial Anglo-Indian words and phrases, and of kindred terms, etymological, historical, geographical, and discursive; new ed. by Wm. Crooke, London, 1903. VI. PHYSICAL DEFECT AS A FORM OF ISOLATION (1) Bell, Alexander G. "Memoir upon the Formation of a Deaf Variety of the Human Race." _National Academy of Sciences, Memoirs_, II, 177-262. Washington, D.C., 1884. (2) Fay, Edward A. _Marriages of the Deaf in America._ An inquiry concerning the results of marriages of the deaf in America. Washington, D.C., 1893. (3) Desagher, Maurice. "La timidité chez les aveugles," _Revue philosophique_, LXXVI (1913), 269-74. (4) Best, Harry. _The Deaf._ Their position in society and the provision for their education in the United States. New York, 1914. (5) ----. _The Blind._ Their condition and the work being done for them in the United States. New York, 1919. VII. FERAL MEN (1) Rauber, August. _Homo Sapiens Ferus_; oder, Die Zustände der Verwilderten und ihre Bedeutung für Wissenschaft, Politik, und Schule. Leipzig, 1885. (2) Seguin, Edward. _Idiocy and Its Treatment by the Physiological Method._ Pp. 14-23. New York, 1866. (3) Bonnaterre, J. P. _Notice historique sur le sauvage de l'Aveyron, et sur quelques autres individus qu'on a trouvés dans les forêts à différentes époques._ Paris, 1800. (4) Itard, Jean E. M. G. _De l'éducation d'un homme sauvage, et des premiers developpemens physiques et moraux du jeune sauvage de l'Aveyron._ Pp. 45-46. Paris, 1801. (5) Feuerbach, Paul J. A. von. _Caspar Hauser._ An account of an individual kept in a dungeon from early childhood, to about the age of seventeen. Translated from the German by H. G. Linberg. London, 1834. (6) Stanhope, Philip Henry [4th Earl]. _Tracts relating to Caspar Hauser._ Translated from the original German. London, 1836. (7) Lang, Andrew. _Historical Mysteries._ London, 1904. (8) Tredgold, A. F. _Mental Deficiency._ "Isolation Amentia," pp. 297-305. 3d rev. ed. New York, 1920. TOPICS FOR WRITTEN THEMES 1. Isolation as a Condition of Originality. 2. The Relation of Social Contact and of Isolation to Historic Inventions and Discoveries, as the Law of Gravitation, Mendelian Inheritance, the Electric Light, etc. 3. Isolated Types: the Hermit, the Mystic, the Prophet, the Stranger, and the Saint.