Cornelius Beach Bradley, The Oldest Known Writing in Siamese… (1909)
“ Of the twenty-one Thăi words accounted as not current now in Siamese speech, I have marked but six as known to me to exist in Lao. No doubt there are others as well, of whose use I am ignorant. To answer the question quantitatively, one would have to know also how many words out of this whole vocabulary are not—or rather were not—current in Lao. And even so, mere vocabulary does not by any means cover the whole ground of dialectal divergence, which consists quite as much in special applications of the same words, and in tone, accent, and phrasing—matters as yet wholly beyond our reach. ”
