On October 25, 1855, they gave birth to Clara in New Jersey. When Clara was 11, she was quarantined in her room with diphtheria for three months. In order to give his daughter something to do those three months, Daniel bought Clara a telescope which he put next to her bed so she could see out her window. This made him ultimately responsible for Clara's soon-after developed interest in science and astronomy, traits she shared with her future husband Emmett Brown.
Daniel tried to set Clara up with nice men from good families, but her intense interest in Jules Verne novels meant that her head was always in a book, and the relationships never worked out. Clara was meek and introspective like her father, but she enjoyed the prospect of being an unmarried woman. Her desire to remain single was enhanced by seeing her mother, formerly a frontierswoman, struggling to ignore her rebellious nature to try to act like a proper 19th century housewife.
Clara thus became a schoolteacher, which didn't surprise Daniel. Unmarried women were common in the profession, and she also enjoyed the fact that young minds were open to many new possibilities, and that they were truthful and imaginative, like herself.
Daniel died in 1879 and Martha died five years later. They had left Clara a modest amount of money and their house in New Jersey. A year after her mother's death, Clara took a teaching job in Hill Valley, California. She had hoped to find adventure, as well as love, as her parents did on the Oregon Trail. When she met Emmett Brown, she found both.
- Back to the Future III (Mentioned only)
- Back to the Future: The Animated Series
- Episode 13: "Clara's Folks" (First identified as Daniel Clayton)
- Back to the Future: Untold Tales and Alternate Timelines