I understand that this is an old post, but it should be corrected. The children shown as children of Thomas & Mary Fagan are incorrect. They are instead the children of their son William Branson Lear. William's wife, Nancy White, already deceased by 1850.
Here is the census record:
1850 Census. South River Twp, Marion Co MO, Hh 1115
Wm. B. Lear, 56, b. VA
Elizabeth A. 25, Milton 23, Izelle 21, female [some say this should have been Isaiah, male], Henry F. 19, John Van B. 17, Oliver H. P. 14, Jane Victoria 12, Jesse M. 10, Martha 7, James Wm. 5