Are you sure she came to the US. I found a couple of Jane Miles with the father Richard still in England as of 1846 and 1866. Can't be sure if its the same one though but 2 different marriages took place. One to John Wilson in 1846 and one to William Jeckill in 1866. The second has her listed as a Spinster on the marriage certificate. I looked at Familysearch.org.