1860 Sublimity, Marion, OR
J. B. Greer 49 VA (Jerome Bonaparte Greer Sr.)
M. J. Greer 43 VA (Matilda Jane Blair Greer)
J. Greer 12 MO (Jerome Bonaparte Greer Jr.)
C. E. Greer 8 OR (Cornelia Emmaline Greer)
A. Greer 6 OR (Amanda Greer)
R. C. Greer 4 OR (Charles Greer)
F. C. Greer 10 months OR (Fannie Greer)

1870 Oakland, Alameda, CA
Jerome Greer 56 VA
Matilda Greer 53 VA
Alexander Greer 36 VA
J. B. 22 MO
Emma Greer 17 OR
Amanda Greer 15 OR
Charles Greer 14 OR
Fannie Greer 9 OR

Emma married first, on 24 Jul 1876, William W. Cunningham (source: marriage license in my possession, this date has to be off as the Sacramento Daily Union dated 12 Jul 1876 lists this marriage occuring 4 Jul 1876 at Pacheco, Contra Costa, CA), son of William White Cunningham and Mary Waring. After the death of William she married Charles Cunningham, William's brother and her brother-in-law in 1904.

1900 Oakland, Ward 2, Alameda, CA
William W. Cunningham Apr 1845 Canada, immigrated 1868, alien, traveling salesman of agricultural implements
Cornelia E Cunningham Jul 1854 OR wife, married 23 years, one child, none living

California Biographical Index 1911
Name: C. E. Cunningham
Born: 1852 Oregon
Father: Jerome B. Greer
Mother: Matilda J. Blair
If married to whom: W. W. Cunningham
Place married: California
Date married: 1876
Years spent in CA: More than 40
Residence: In San Francisco or Alameda until 1900, then in Pittsburg, California, New York and Canada.
Married second to C. S. Cunningham in 1904 in Canada.
Present address: Santa Rosa, CA
Note: Died 5 Apr 1915 Antioch, Contra Costa, CA

Oakland Tribune, Tuesday, 6 Apr 1915
Well Known Oakland Botanist Passes Away
"Mrs. Emma C. Cunningham, well known botanist and artist of Oakland, died suddenly last night in Antioch (Contra Costa County), where she removed from here several years ago. She was in apparent good health until yesterday. She was a keen botanist and gained a reputation as a lecturer on that subject, delivering addresses before many Oakland Clubs.
Decedent is survived by her husband Charles Cunningham; Mr. and Mrs. J. B. Greer of Oakland, relatives of Mrs. Cunningham, received a telegram last evening announcing the sudden death. Arrangements for the funeral have not yet been announced."

Oakland Tribune 7 Apr 195
Failure To Visit Fair Reveals Woman's Death
"Antioch - Apr 7 - The failure of Mrs. Cornelia Cunningham to keep an engagement with here sister at the Panama Pacific International Expo on Saturday led to the discovery of her body in her home in (should be on) Fourth Street yesterday.
When Mrs. Cunningham did not meet her sister, Mrs. R. H. Caven of Concord, at the appointed time and place, the latter became worried and endeavored to communicate with her. Failing in this, Mrs. Caven came to Antioch and found the body of her sister on the floor in the dining room. She had died of heart disease Saturday morning while preparing to go to San Francisco."

Oakland Tribune 7 Apr 1915
Martinez Notes
"Mrs. Emma Cunningham of Antioch, prominently involved with botanical affairs and a well known artist, died suddenly at Antioch last night, where she had taken up her residence after living in this city for many years. Survived by her husband Charles Cunningham of Martinez."