From Leolaia
Alright, I knew if I did a little bit more research, I'd find the answer. I think the following pretty much proves that Rose Ball was born around 1869. And I found all this within a half-hour of research. I thought the best day of finding out her true age would be to find her birth certificate and then correlate the new data with the earlier census data. So I went to the Victoria Registry website and for a modest fee did a search on "Rose Henninges":
http://www.dvc.vic.gov.au/bdm.htm
And I found "Rose Ball Henninges". And for another modest fee, I was able to get an image of her death certificate:
This is clearly our Rose Ball Henninges, as she is the widow of Ernest Charles Henninges. She is also listed as an "Authoress," precisely what she did in the New Covenent Church. Now, note that she is listed as having been 81 years old when she died. She died on 22 November 1950. This means that she was born in 1869.
The death certificate also states that she was born in Buffalo, New York. Armed with this new piece of data, I went back to the census data to see if I can find a Rose Ball, born in 1869, who lived in Buffalo. And indeed, there was:
This is the 1880 census. Here we see Rose Ball, the daughter of Catherine Ball, 10 years old, living in Buffalo, New York. This means that she was born in either 1869 or 1870.
This confirms the data in the death certificate.
http://www.jehovahs-witness.net/watchtower/child-abuse/75868/2/Charles-Russell-Alleged-Child-Abuser