That the use of secret languages and the invention of them by children is widespread and prevalent at home, at school, in the playground, in the street, is evident from the exhaustive series of articles in which Dr. F. S. Krauss (281) of Vienna has treated of "Secret Languages." Out of some two hundred forms and fashions there cited a very large proportion indeed belong to the period of childhood and youth and the scenes of boyish and girlish activity. We have languages for games, for secret societies, for best friends, for school-fellows, for country and town, for boys and girls, etc. Dr. Oscar Chrisman (206) has quite recently undertaken to investigate the nature and extent of use of these secret languages in America, with gratifying results. A study of the child at the period in which the language-making instinct is most active cannot be without interest to pedagogy, and it would not be without value to inquire what has been the result of the universal neglect of language-teaching in the primary and lower grade grammar schools--whether the profusion of secret languages runs parallel with this diversion of the child-mind from one of its most healthful and requisite employments, or whether it has not to some extent atrophied the linguistic sense. The far-reaching ramifications of "secret languages" are evidenced by the fact that a language called "Tut" by school-children of Gonzales, Texas, is almost identical in its alphabet with the "Guitar Language," of Bonyhad, in Hungary, the "Bob Language," of Czernowitz, in Austria, and another language of the same sort from Berg. The travels of the Texas secret language are stated by Dr. Chrisman to be as follows: "This young lady ... learned it from her mother's servant, a negro girl; this girl learned it from a negro girl who got it at a female negro school at Austin, Texas, where it was brought by a negro girl from Galveston, Texas, who learned it from a negro girl who had come from Jamaica" (208. 305). Evidence is accumulating to show that these secret languages of children exist in all parts of the world, and it would be a useful and instructive labour were some one to collect all available material and compose an exhaustive scientific monograph on the subject.