Isabella Lucy Bird Bishop, Unbeaten Tracks in Japan — LETTER XXVI (1880)
“ Often it is loud and shrill, then guttural, at times little more than a sigh. In these yadoyas every sound is audible, and I hear low rumbling of mingled voices, and above all the sharp Hai, Hai of the tea-house girls in full chorus from every quarter of the house. The habit of saying it is so strong that a man roused out of sleep jumps up with Hai, Hai, and often, when I speak to Ito in English, a stupid Hebe sitting by answers Hai. ”
