Denton Camery, b. OH, 1847
I'm not related to this family, but extracting records from the 1870 census for Lee County, Iowa, Ft Madison penitentiary, there is an inmate there listed as follows:
Denton CAMERY, age 23, born OH, former occupation - clerk
This would mean he was born about 1847 in Ohio.
I hope this is helpful to someone.It doesn't list his crime or why he was incarcerated.