Looking for marriage and/or burial information for Duane H. Peck and Amelia C. ____ to prove her maiden name.

Duane born about 1841 is son of Martha Peck: had brother John F. and sister Celestia E. according to census information. He seems to have married Amelia in mid 1860's - one son James [born 1878, living with parents in 1900 census]. This family moved around: Jefferson County NY - towns of Champion, Wilna [Carthage] and Lafargeville. [He is not either of the Alexandria area Duane Peck's].

I'm looking for my ggg-aunt Amelia Carncross born about 1845 + or -. My only clues are that she took off in mid-late teenage years from Smyrna, Chenango Co. NY - "evil stepmother syndrome". She may have said she was older, which would explain census birth given as about 1841. Her brother Lewis Carncross, Jr. visited her in La Fargeville some forty years later - early 1900s. [Her uncles had lived briefly in Jefferson and Lewis county many years before; there is a more distantly related Carncross/Carncrose group in those counties as well - all part of earlier migration from Montgomery Co. NY]

Duane Peck is best match I have come up with - need someone of you Peck experts to help me prove, one way or the other. Thanks.