Gerald,
There is no sign of Rebecca or Benjamin Howland in 1870 Wisconsin. Nor any Busey's or similar in 1870 Grant Co.
The 1870 MO census lists a Rebecca Howland in Lagrange, Lewis Co., MO, Page 673.
The 1870 IA census lists a Benjamin F. Howland in 1 W. Cedar Rapids, Linn Co., IA, Pg. 123 and a Benjamin Howland in Cass, Cass Co., IA, Pg. 67.
But, Rebecca and children do seem to be in 1880 Iowa.
1880 Census, Greenfield, Adair, Iowa, Page 84A
Rebecca A. HOWLAND, 54, KY, Keeping House Fa: PA Mo: KY
Charles E. HOWLAND, 21, MO, Farmer Fa: PA Mo: KY
Nemeta F. HOWLAND, 15, IA, At School, Fa: PA Mo: KY
Here may be son Benjamin:
1880 Census, Greenfield, Adair, Iowa, Page 83D
Ben F. HOWLAND, 17, WI, Fa: ---, Mo: ---
Ben F. is living in the household of Mary A. Mook, age 60, and family.
An interested researcher,
Dave Taft
Arlington, TX