During excavations in the Caves of the Eight Immortals he discovered a culture hitherto unknown. This culture dates back to Paleolithic times and was a branch of the southern China cultures of that period.
八仙洞發現的石器，屬於舊石器時代晚期，最久的距今約一萬五千年，是在台發現年代最早的文物。」除八仙洞出土的古物外，前年忠勇村（舊名加走彎頭）居民又發現許多形狀特殊的大石頭，經宋教授考證，確認為「麒麟文化」的一部分。