Although I'm not related to the Myers, I've been researching my ancestors in Clinton County for three years now, (I was b. in Clinton County).I thought that you would appreciate the following information.
One of my favorite research tools has been cemetery transcriptions, and for a number of reasons.You can order Clinton County cemetery transcriptions from the Elsie (MI) Historical Society via http://www.rootsweb.com/~migratio/elsiehiso/elsiehistsoc.htmlhttp://www.rootsweb.com/~migratio/elsiehiso/elsiehistsoc.html
You would be interested in at least two of these books.The first is Maple Grove Cemetery where there are 8 Myers listed, including an Edna E. Myers 1881 - 1962.Those dates do not seem to coordinate with your information, but the name is significant enough to mention.
You might also benefit from the Ford Cemetery (Gratiot County) transcripion, because there are 21 Myers listed with an Edna who d. March 1910.No date of b. is given or age.
Gratiot County is just north of Clinton County, so when researching Michigan ancestors, it is beneficial to always check across county lines, especially in states like Michigan where there are many.Arizona, in contrast, has few counties.
There are a lot of reasons that I have found working with the transcriptions to be beneficial.One is that often parents are noted, even with the mother's maiden name.So, when time has allowed, I've read down the "Parents" column looking for familiar maiden names, and have found ancestors that I might have not otherwise located.
Good luck with your research!
Jack Sheldon, Jr. Mesa, Arizona (formerly of Owosso, MI)