So, we can assume there may have been a shotgun at the weddings? My 2xGGrandfather had a daughter who was half black. Not sure who the mother was but that may have been one reason he was kicked out of the Navy Yard. Have found her marriage record and she married a FMC. She must have died between 1860 and 1870 because she's not been found on any records after the marriage and the 1860 census.