Hi.I did some searching today.I believe that Dickie who married a G.B. MCCULLUM according to the IGI at the mormon website(Dec. 8, 1868), is America Frances TOOLE.I found her with her husband in 1870 in Otoe Co., Nebraska City, Nebraska.The same place that the NORTHCUTT family was in 1880.I can't find them in 1870.The MCCULLUM family was listed by first initial only in 1870.
G. MCCOLLUM 27 b.MICH D. "24 b.MO G.W. "5/12 b.NEB
In 1880 they were in the same place: George MCCULLINS 36 b.CAN America"25 b.MO George"10 b.NEB Grace"7 b.NEB
In the 1885 census I only found the mother and two children: FrancesMCCOLLUM 37 b.MO George W."15 b.NEB Grace"12 b.NEB
I haven't been able to find them in 1900. Also the last child listed in 1860 Buchanan as "E" I believe is a son named Edwin/Edward who died in 1860 according to internet records.