Van der Aalsvoort laments that the loss of historical materials on Taiwan has compounded difficulties, and likens his work to "sifting for gold in an abandoned mineshaft." He also acknowledges, however, that difficulty can make the breakthroughs all the sweeter.
蘭伯特感嘆台灣史料的佚失增加了尋找難度，他「彷彿是在被遺忘的礦坑中挖掘金塊」，但他也不否認搜羅史料的難度卻也帶來種種驚喜。