After reading the thread, I believe that Robert was the son of Adam and Eliza (Wilson) Heilman. Eliza was the second daughter of my ggggrandparents, Robert Wilson and Eleanor (Heilman) Wilson. She was born in 1829 and died after 1863. Eliza and Robert had 5 children of which I'm aware: Lucinda, Narisa, Krodile, Robert, and Silas.
I descend from Eliza's brother John, b 1826, who married Jane/Jennie Christy. They moved to Saline County, IL after the Civil War.
I also show that another sister, Ellen (b 1835) also married into the Heilman family, She married John Heilman in 1852 and had 7 children: Amos, Josephine, Emma, John, Jacob, Edgar, and Ellen.
If you know of any descendants of these families, please contact me. There will be a reunion of John & Jennie Wilson descendants (ergo Robert and Eleanor's too) this summer in Harrisburg IL. Would love to expand our circle of cousins!