The following data is extracted from A History of the Pioneer Families of Missouri - Montgomery County.
Benjamin Gammon, of Madison County, Va., married Sarah Maddox, and settled in (now) Montgomery County, Mo., in 1812. They had John, Henry, Anderson, Stephen, Jonathan, Benjamin, Jr., Harris, Elizabeth, Julia, and Sarah. John, Anderson, and Benjamin all died unmarried. Jonathan married Martha Dickerson, and lives on Hancock's Prairie, in Montgomery County. Sarah married Alfonzo Price. The other children married and settled in different States. Mr. Gammon, Sr., built a hand-mill on his farm, which was the first in that part of the country, and it supplied his own family and his neighbors with meal for some time. The meal for his own family was generally ground just before it was required for use, and he allowed two ears of corn for each individual; but one day Jacob Groom took dinner with them, and they had to grind three ears for him, as he was very fond of corn bread. The grinding was done by the children, and it was said that Mr. Gammon "broke all his children at the mill.”
Source: A History of the Pioneer Families of Missouri - Montgomery County