The Eunuchs of China - About the practice of using emasculated and castrated males to serve in the emperor's harem from the 8th century B.C. to 1912. www.usrf.org/news/010308-eunuchs_china.html
The Story of My Misfortunes - Full text from Peter Abelard's Historia Calamitatum, which recounts his affair with Heloise and subsequent castration. www.fordham.edu/halsall/basis/abelard-histcal.html
Tucker's Gender Page - Several articles, including how eunuchs were made, terminology, eunuchs in literature, references to eunuchs in the Bible, and translation of related terms into Chinese and Indian. www.angelfire.com/ri/tucker/gender.html