Justin: If you can find someone to check the Sandusky courthouse for you, there is an index card file of Erie County births and your Mary Davey (or the one in the census) may be listed there. It may help you confirm or exclude the information you have so far. Parents are listed on the cards. I was just there last week, but unfortunately live in FL and cannot help you now. I found a lot of Kelley's Island births among the files. Check with the volunteers on the web site for someone who will go to the courthouse for you. Good Luck, Nancy