What I have for Elmira is that she married Alfred Austin, child Minnie Austin d 12/1967 b Ishpening, MI: Step brother William Julian, step sister Elsie Julian.
I don't think John Peter is the one. But here is what I have:
John Peter 2/4/1784 Northampton Co., PA d 10/12/1873 m Catherine Fatzinger Children Rebecca 7/17/1813 m Jacob Stump Sarah m Hoekk Mary m Charles Zolner Elizabeth m Charles Mertz Charles 8/12/1818 d 9/3/1891 m Harriett Reichard Henrich 1816
Unfortunately I didn't copy down the 1810 Census.But I will check Bess Osenbaugh's notes at the FHC this week and look for Elmira and John's (1770-1784) to see what I find out.Have been updating my data base with new info from her notes.