The sad facts of Clara's family are that Clara and Ossip had a daughter,
born months after Clemens' death. Ossip died, I think in the 1930's and
Clara and daughter Nina moved to California. Clara remarried. Nina never
really found herself. Clara died in the early sixties, there was a fight
over Clara's estate and NIna died in a motel room a few years after her
mother.

To get a more complete story about this I recommend Caroline Thomas
Harnsberger's "Mark Twain's Clara or What Became of the Clemens Family"
published in Evanston, Ill, by the Press of W. Schore in 1982.

Barbara Taylor
Cornell University Law Library