I'm hoping you will see this, as genforum doesn't notify anymore.I noted your Guernsey Co query re: census, so maybe this will be of help.It's been almost a yr since you posted, and possibly have already obtained new info to further your research.
1850 Warren Twp[Barnesville], Belmont Co OH GRIFFITH Robert 24 VA Rebecca 22 OH Milo 3 OH Sarah M 1/12; Sarah Margaret d 2-25-1926 Belmont Co MC DONALD, James D 13 OH
5-31-1846 Robert GRIFFITH m. Rebecca MC DONNELL[MC DONALD?] Robt/Rebecca also had the following ch: Mary b c 1853; d 1955; m. JARROTT Annie Laurie 1862-1951; m. MAYHEW Details on familysearch.org
There is also Stephen MC DONALD in 1850 Warren Twp, who may be a bro of James.Stephen also has son James. 4-7-1844 Stephen MC DONALD m. Rebecca SIGFIELD, Belmont Co.
1860 James MC D in Brown Co IN with Leander J and Louisa [PATTON] MEADE, who were m 10-31-1848 Belmont Co.
1870 Barnesville, Warren Twp GRIFFITH Rebecca 39 OH Sarah 20 OH Mary 15 OH Annie 9 OH MC DONALD, Margaret 72 PA
Possibility 1830 Bridgeport James MC DONNELL100001-110101