Quinion, Michael (2001年1月13日). “On "Ivory Tower"” (英語). WorldWideWords.org. 2021年8月18日閲覧。 “The origin is the Bible, specifically Chapter 7, Verse 4 of the Song of Solomon, in which Solomon is extolling the beauty of his beloved... Not quite the thing today [...] but it struck a chord with Charles-Augustin Saint-Beuve.”