It appears Sheldon and Josie began living together about 2 years after Mary died.

A marker for her does not include death but there is one for a Josephine Hubbard 1857-1924 in goldfield Cemetery in Nevada. She had lived there for 20 years. Parents Mr Curtis and Ann Lillian McPhearson with could match her father born in Germany and mother born in Scotland. Josie could have moved there after Sheldon’s death