2. _Language in Relation to the Antiquity of Man._--In many animals the voice has a distinctive character; but in man it has an importance altogether peculiar. The gift of speech is one of his sole prerogatives, and identity in its mode of exercise is not only the strongest proof of similarity of psychical constitution, but more than any other character marks identity of origin. The tongues of men are many and various; and at first sight this diversity may, as indeed it often does, convey the impression of radical diversity of race. But modern philological investigations have shown many and unexpected links of connection in vocabulary or grammatical structure, or both, between languages apparently the most dissimilar. I do not here refer to the vague and fanciful parallels with which our ancestors were often amused, but to the results of sober and scientific inquiry. "Nothing," says Professor Max Mueller, "necessitates the admission of different independent beginnings for the material elements of the Turanian, Semitic, and Aryan branches of speech; nay, it is possible even now to point out radicals which, under various changes and disguises, have been current in these three branches ever since their first separation." Of the truth of this I have convinced myself by some original investigation, and also of the farther truth that of this radical unity of all human tongues there is more full evidence than many philologists are disposed to admit, and that the results of future study must be to connect more and more with each other the several main stems of language. Whether this results merely from the psychical unity of the human race, or from the historical derivation of languages from one root, is not so material as the fact of unity; but that the latter is implied it would not be difficult to show.[126] Let us examine for a little these results as they are presented to us by Latham, Mueller, Bunsen, and other modern philologists.