If the researcher has ready access to the census, then a manual search is in order. In this case, locating a map is helpful. Get Thee to a Map Maps are especially helpful for those areas with which the researcher is not familiar. However these maps do not show township lines, which are frequently necessary to locate rural ancestors in the census. There are also offline print township maps in plat books and in many cases a modern plat book will be sufficient for this purpose.
Some county histories have township maps as do old plat books showing farm ownership.
It is possible that some of these materials may be available for loan through the Family History Library. Readers may also wish to post questions about township maps to appropriate geographically based genealogy mailing lists. There are other nearby townships in the county, but starting with those that share borders is a good initial approach, continuing with those that share a corner. Additionally in this case, the southern border of Walker Township is the Hancock-Adams County line. If I knew approximately where in the township the family lived, that information would be helpful as well.