James and his children moved to English Township, Iowa County,
Iowa (near Millersburg) about 1852. That's next to
Keokuk County, where his brothers Thomas and Page (and other relatives)
had settled.
I am not positive that it is this James (David's son)
who either married Elizabeth Dorman or who is listed in the
1850 census in Jackson Co., and I definitely don't have any
proof that it is. But I am pretty sure it is him in the 1850
census, mostly because of the children's names and his proximity
to the Pierson family (4 census listings away).
Census: 1850, Vernon Twp,Jackson Co.,Indiana
Census: 1856-1860, English Twp, Iowa Co., Iowa