Looking for Josiah (b. 1831) and his wife Susan prior to 1870. They appear in the 1870 Census in Wash. County, MD. Both say they are born in Maryland and they have 6 children listed...John H.(my ggg-grandfather), Emma S., Ann R., Alice E., Julia L, and Harvey E). But when I try to go back to the 1860 or 1850 census I am not finding them. It's possible with all the weird spelling variations of the name Rohrer that they are there. Can anyone help me?