A pre-Silmarillion speculation on how immortality is inherited in elf-human crosses, based solely on information then available in the Appendices to Lord of the Rings.
"The Hereditary Pattern of Immortality in Elf-Human Crosses,"
Tolkien Journal: Vol. 2:
1, Article 5.
Available at: https://dc.swosu.edu/tolkien_journal/vol2/iss1/5
Copyright held by Artist