You might want to email or call the Records Center and see if Gladys Tannehill is in their index.If you had a date you might be able to find a death notice in the Defiance newspaper under Hicksville news.It might tell where she is buried.
Defiance County Records Center 510 Court St. Defiance, OH. 43512 Tel: 419-782-8918 firstname.lastname@example.org
If she's not listed at the Records Center you can try checking the Defiance County Health Department Index.The Defiance Genealogical Society has some new publications and this index is one of them. The death index covers 1908-1996.http://www.rootsweb.com/~ohdcgs/publications.htmlhttp://www.rootsweb.com/~ohdcgs/publications.html