Charles E. Sprague, Hand-book of Volapük — 4 (1887)
“ Two vowels coming together are sounded in separate syllables ; as laut (la-ut) , geil (gay-eel) , sied (see-aid) .In writing and printing Volapük a system of punctuation is employed which differs slightly from ours, as follows:The quotation-marks are ,,---'' instead of "---". ”
