I don't know if you have gotten any info on Nathaniel Milburn yet, but I have some to share. I am a descendant of his brother, William Bryant Newton. My father's name was Milburn Henry Newton (Nathaniel after his great uncle Nathaniel, and his great grandfather, William Henry Newton).
Nathaniel and Ella Jane had a total of ten children. They are both buried in Georgetown, Texas at the IOOF Cemetery, along with several of their children. They lived in several places in Texas, including Gonzales, Guadalupe County, and Austin. He passed away in Austin on October 19, 1910.
Susan Melinda was born Sep 3, 1869 in Gonzales, married WC Lott about 1889 and had two children James Newton Lott, and Clara F Lott.
I have a public tree posted on Ancestry with a lot of Newton info. Feel free to look. The tree is titled "Our Roots and Off Shoots". If you find you have to have an invitation, just let me know. My email is "firstname.lastname@example.org