Here is a link to an old township map that shows where Sec. 29 is.

http://www.genealogybug.net/franklin_county/maps/madison.pdf

The road referenced is probably Groveport Rd. which basically runs east-west. On a modern map like Mapquest, the property was probably near where Hendron Rd or London-Groveport Rd. crosses it. I believe the Columbus Library has two older sets of these maps. I live real close to the area. Next time I am down that way I will check out the area.

Jim