I see two Mary J(ane) Evans b about 1840 and with parents John and Elizabeth.One who was b 1839 is a somewhat distant relative of mine but has the disadvantage of having died in 1855 according to the sketchy info I have about her.(Of course it's possible the DOD is wrong).
The second is probably the one you want.I show her b 1842.She's shown as 8 in 1850 and 18 in 1860.She has siblings, Lorenzo, Abner, Nathan, William, Harrison & Nancy.Depending on what census you believe her parents were b OH, VT or even NY (for Elizabeth from Abner's 1880c.)Does this sound like the right family?If not, can you post a bit more information, such as exactly where these 1850 and 1860 censuses were from?
Anyway reply here or to my email and we can discuss this further.