Charles,
I may have info on Augusta. Do you know her birth year? I have an Augusta Doering b. 2 Feb 1866 in St Louis. I have a 1908 marriage for her and show her living w/her parents on 1880 and 1900 census, but it is possible that she married and was widowed between those dates, even tho' 1900 census shows her as 'single'.
Please let me know if you'd like more info.
Mary