Just thought you may want o know - there are two Calvin Davis's if your info is correct.
My Calvin Davis was moren 29 Mar 1849 in Listonburg, Somerset Co., PA and d. 14, Mar 1929 same. he is buried in the St. Mary's Ev. Lutheran Ch. Cem. in Listonburg, PA. This is near the PA-MD border. I have photos of the cem. if anyone interested