The same thing has bean suggested by other learned men.

Thus Dr.James P.Wilson, of Philadelphia, in an octavo published in 1817, says: "It is difficult to discern how communities could have existed without language, and equally so to discover how language could have obtained, in a peopled world, prior to society."-- _Wilson's Essay on Gram._, p.1.I know not how so many professed Christians, and some of them teachers of religion too, with the Bible in their hands, can reason upon this subject as they do.

We find them, in their speculations, conspiring to represent primeval man, to use their own words, as a "_savage_, whose 'howl at the appearance of danger, and whose exclamations of joy at the sight of his prey, reiterated, or varied with the change of objects, were probably the origin of language.'-- _Booth's Analytical Dictionary_.

In the dawn of society, ages may have passed away, with little more converse than what these efforts would produce."-- _Gardiner's Music of Nature_, p.31.Here Gardiner quotes Booth with approbation, and the latter, like Wilson, may have borrowed his ideas from Blair.

Thus are we taught by a multitude of guessers, grave, learned, and oracular, that the last of the ten parts of speech was in fact the first: "_Interjections_ are exceedingly interesting in one respect.
They are, there can be little doubt, _the oldest words_ in all languages; and may be considered the elements of speech."-- _Bucke's Classical Gram._, p.78.On this point, however, Dr.Blair seems not to be quite consistent with himself: "Those exclamations, therefore, which by grammarians are called _interjections_, uttered in a strong and passionate manner, were, _beyond doubt_, the first elements or beginnings of speech."-- _Rhet._, Lect.