Further to my note in response to yours from August, 2002, I realized that I should also have pointed out my connection to the Joseph McCargar of the Shelby NY area. Joseph m. Amy Robinson and had several children, including Daniel (1820 - 1895). Daniel married Sarah C. Vail (1821-1894). Sarah's brother, Frank W. Vail, married Margaret McCargar, daughter of Hugh and Elmina. From my earlier note, you'll find that Frank/Margaret were my grgrgranparents. (I am the daughter of Thelma Blair and John Gibson which I should have indicated.)
Question: Do you have any info on Daniel/Sarah C? They did not appear to have had any children. From the census, it appears that he was a farm hand. That's all I know.