Nancy, I found the marriage record for Martha Newton at the www.familysearch.org site. It is a great, free site.If you are not familiar with it, it takes a little practice.After opening the site I clicked on Search, then scrolled down to United States.When it opened I went down the menu to Wisconsin and found a Wisconsin Marriages site for that time period where I entered the name Martha Newton and saw the Neff names.
I don’t know whether or not this direct link will come through, but I will try:
Enumerators often made mistakes.I have an aunt who was listed as male in one enumeration.
In the 1860 census for Albert and Martha Pratt there was a son named Francis, whose age would have indicated he was from her first marriage, but I could not find him again.Albert was married to someone else by 1870, and I do not know whether Martha died or they were divorced.
From the 2nd marriage there was a son named Ethan whose full name was Ethan Allen.He went by Allen and I found further information for him.In all the census records for him he listed his father as born in NY and his mother as born in Indiana, so Indiana is probably correct.I could not find these sons in 1870, and I could not find the Newton family in 1850.Martha had 2 daughters from the 2nd marriage, Alaveda and Amanda.I did not find further information about them, although they were probably married by 1880.
In 1850 Saline Co. MO there is a Henry and Amanda Neff.Living with them was a son, Isaac Neff. I hope this can further your research.It is so frustrating when names cannot be found on census records.
I’m not related but I had ancestors in Indiana so sometimes I check the queries there.Good luck on further research.
Familysearch.org has death certificates from Texas, 1890-1976, but I could not find one for William James Newton.