Based on: "Sampson Stevens DIED SEP. 16. 1888 AGED 82 Yrs. 5 Mos. 6 Ds.", his birth date was: April 10, 1806.
I confirmed this with this calculator that I found pretty useful: http://www.timeanddate.com/date/dateadded.html?m1=09&d1=16&...=
http://www.findagrave.com/cgi-bin/fg.cgi?page=gr&GRid=30134737
further discussion: http://www.findagrave.com/cgi-bin/fg.cgi?page=mr&MRid=46817114