Janet -
Shelby Township is in the lower southwestern corner of Ripley County. It
borders Jennings County on the west and is immediately north of Jefferson
County.
I have sent you a map taken from a book of Congressional Townships in
Indiana that I think was published in 1850. I've outlined the border of Shelby
Township in red as best as I can determine.
The township boundaries don't follow the rangeline divisions if I'm reading
the dark borders correctly, so my interpretation on where they fell exactly
might be off.
It'll still give you a good idea on where it's at, though.
Alan McCullough