I am searching for my CURTIS ancestors. Brothers James, Peter and a third brother (probably) Michael came to Illinois in the 1850s. Peter's marriage license says that his parents were John and Ellen (NMN) CURTIS. James headstone says he was born May 17, 1829. He was married to Margaret MURPHY, daughter of Martin and Catherine Everett. I don't know if they were married in America or in Ireland. I haven't been able to find them in any of the online databases that I've checked. I will appreciate any help.