This will be quick.
I found parents of Morgan Lewis Williams on LDS Ancestral File:
William Lewis Williams, b. abt. 1847, maybe Turkey.
Fannie Elizabeth Hooper, b. abt. 1851
Also, California Death Index lists Catherine Elizabeth's death in 1956 under the surname Dixon, so she remarried, either after Morgan's death or divorce. The latter appears more likely, as the LDS source gives his death as 1962, in England.
Not sure about reliability of the data.