`` i will make soup , '' gong su said , `` and we will let it cook overnight , so more of the virtue will go into the water , '' and three times during the night , laurence roused to see him depositing more hot stones from the fire into the cooking-hollow , clouds of rich steam billowing out from under the oilcloth , soft hissing smoke as the rocks went into the water : kulingile woke with him , his small head rising on the narrow slender neck from under demane 's protective arm , to watch very intently , and sniff deep .