Are you sure about Mary, wife of John H. Burkholder being the daughter of Samuel and Anna (Burrell) Nevers. I believe that the Mary you refer to is Samuel and Anna's granddaughter. She was the daughter of Samuel and Elizabeth (Palmer) Nevers, Jr. She was b: 8 Mar. 1811 d: 4 Mar. 1897 and married John H. Burkholder 11 Dec. 1832.
I have source references to support my information.