The third case cited by Mr. Hale is that of two little boys of Toronto, Canada,--five or six years of age, one being about a year older than the other, who attended a school in that city: "These children were left much to themselves, and had a language of their own, in which they always conversed. The other children in the school used to listen to them as they chattered together, and laugh heartily at the strange speech of which they could not understand a word. The boys spoke English with difficulty, and very imperfectly, like persons struggling to express their ideas in a foreign tongue. In speaking it, they had to eke out their words with many gestures and signs to make themselves understood; but in talking together in their own language, they used no gestures and spoke very fluently. She remembers that the words which they used seemed quite short" (249. 18). Mr. Hale's studies of these comparatively uninvestigated forms of human speech led him into the wider field of comparative philology and linguistic origins. From the consideration of these data, the distinguished ethnologist came to regard the child as a factor of the utmost importance in the development of dialects and families of speech, and to put forward in definite terms a theory of the origin and growth of linguistic diversity and dialectic profusion, to the idea of which he was led by his studies of the multitude of languages within the comparatively restricted area of Oregon and California (249. 9). Starting with the language-faculty instinct in the child, says Mr. Hale: "It was as impossible for the first child endowed with this faculty not to speak in the presence of a companion similarly endowed, as it would be for a nightingale or a thrush not to carol to its mate. The same faculty creates the same necessity in our days, and its exercise by young children, when accidentally isolated from the teachings and influence of grown companions, will readily account for the existence of all the diversities of speech on our globe" (249. 47). Approaching, in another essay, one of the most difficult problems in comparative philology, he observes: "There is, therefore, nothing improbable in the supposition that the first Aryan family--the orphan children, perhaps, of some Semitic or Accadian fugitives from Arabia or Mesopotamia--grew up and framed their new language on the southeastern seaboard of Persia." Thus, he thinks, is the Aryo-Semitic problem most satisfactorily solved (467. 675). In a second paper (250) on _The Development of Language_, Mr. Hale restates and elaborates his theory with a wealth of illustration and argument, and it has since won considerable support from the scientists of both hemispheres. Professor Romanes devotes not a few pages of his volume on _Mental Evolution in Man_, to the presentation of Mr. Hale's theory and of the facts upon which it is based (338. 138-144). _Secret Languages._