George: Middle Spring appears to be just over the Franklin county line in Cumberland County (not Perry), same as my 1890 atlas. It's very close to Shippensburg, which straddles the county line. The Kittochtinny Historical Society in Chambersburg is the repository for an abundance of Franklin County genealogical info, including area cemetery records. Kittochtinny Historical Society has a website: <rootsweb.com/~pakhs/>. I see there is also a Shippensburg Historical Society, which might help you with Middle Spring. Carol