Renward Brandstetter, An Introduction to Indonesian Linguistics…
“ In such a case we can find the form which for us is the more important one only in texts printed in the native character. The word for " generation ", for instance, appears in the vocabulary only under the form sunduiq; but in the texts I find sundut, and that this find may be rehed on, i.e. that this spelling really embodies the older pronunciation of the word, is proved by the fact that Karo, another Sumatran language, actually says sundut. Here then we have a phonetic phenomenon which only a text could reveal, both grammar and vocabulary having failed us. ”
