Dear Kate, Thank you for all the good information.I put together what you gave me and some from a couple other sources and come up with some insight into the families.
The Dennis Lancaster married Alice Conway, my ggrandfather's sister in Scott county, Illinois. (Our family spelled it Lancaster, however the 1880 census lists them as Landcaster). There children were Miles, Mary, Katy, Margret, Lizzy and Joseph according to the 1880 census and they are living in Libertyville, Lake County, Illinois.Also in Libertyville are my greatgrandparents, Daniel and Sarah Conway and children, Kate, Briget, Miles, Jane, Alice, Mary, Daniel and Sarah. Julia not listed was the oldest and would have left home by the 1880 census.
I have ordered a film of St.Joseph's Catholic Church records, located in Libertyville, I will check to see if Miles Lancaster and Alice are Godparents of Mile Conway. I also hope to find some death records for further information such as what Sarah Conway's maiden name was, etc. The Alice Conway sister to Daniel Conway also is probably who my grandmother was name after.Thank you I finally have found my grandmother's family!!Cora