23andMe predicted that Michael and Eileen were 3rd cousins and turns out they match on 5 segments. Michael listed Lewis as one of his family surnames, so that was where I concentrated on when corresponding began.
Michael was able to name his 2nd-great grandfather and his wife, who I was able to find in my database and make the connection. I quickly wrote back to him to share the connection and ask for more information on his line down from the common Lewis ancestors.
The common ancestors between Michael and Eileen are Jacob Lewis (1847-1898) and Marietta Cook (1855-1942). Michael's 2nd-great grandfather and Eileen's great grandfather were brothers. The line of descent goes like this:
Jacob Lewis & Marietta Cook
Wilfred Lewis - brothers - Lawrence Solomon Lewis
Glenn Lewis - 1st cousin - Leota Marie (Lewis) Pefley
Michael's grandfather - 2nd cousin - Eileen's mother
Michael's father - 3rd cousin - Eileen
Hopefully, this will spark some correspondence that will generate more family information on these Lewis relatives, as I don't have information on Wilfred's line right now in my database.