I found a Henry Harman in the index for Lucas Co. naturalizations. There was no date given, only Volume 4, pg. 166. I checked at the courthouse in Toledo, and they told me that the naturalization records are at the Archival Collection at the Jerome Library in Bowling Green. I don't know when I'll get to Bowling Green, so it might be quicker for you to write them or the Wood Co. Chapter, Ohio Genealogical Society and see if this is what you need.