Joseph Edkins,
A Grammar of Colloquial Chinese…
“ Grammarians would not speak with such hesitation, as they do, when describing these peculiar intonations of the civilized races of the old world, if they had heard and could discriminate the Chinese tones. Late speculations on the change in language-forming power that has taken place in modern times, have referred to the gradual diminution of inflexions in new languages, and to other circumstances, as instances of it. From these has been argued the decay of a certain faculty once possessed by the human race. ”
