Hi again, Sarah,
Based on the information that you sent me, I see now that the Juliaett M. Ball that is buried in Greenwood/St. James Cemetery in Amherst, Portage County, Wisconsin is Julia Danforth, as the death date is the same as your information. I am curious as to the cause of her death, as she was only 40 years old at the time.
As to the mother of Amza (or Amasa as you have it shown) Ball, I have seen sources on-line that show her as Abigail Thompson, but don't really have any documented information saying what her maiden name was, so it may very well have been Bennett.
I have an obituary for Amza Ball showing that in 1882, he crossed the plains with his 2nd wife, Sophia Dwinell, and settled in the Boise Valley in Idaho.
I appreciate your efforts and assistance. Thanks again.