I have been going through my records & have a little more for you.I believe Martha Jane was probably born in Prophetstown, (Whiteside County) Illinois on Aug. 15, 1883.The family resided there until they moved to Adams County, Nebraska in 1887.I believe that her mother's name was actually Hulda Steele, although I have seen it spelled as you had it.
According to Charles E. Oatman's obituary, Martha Jane and her husband were living in Helper, Utah in 1908 at the time of Charles E.'s death.
Martha Jane's brothers & sisters were Ida, Katie, Maude, Floyd Henry, John Harvey (my grandfather), and Hazel Irena.
Martha Jane's half brothers & half sisters were Clinton Emmitt, Daniel Anthony, Mary Irene (Mamie), Sarah Almenia, and Gertrude Jenett.These were from a previous marriage to Mary LeFrancis who died in 1877.
I would be interested in any information you have of the family line descended down from Martha Jane & Ray.