"United States Census, 1850," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/M6RM-22S : accessed 10 Nov 2014), John H Gray in household of Young E Gray, Christian county, part of, Christian, Kentucky, United States; citing family 429, NARA microfilm publication M432, NARA microfilm publication M432, National Archives and Records Administration, Washington, D.C.
"United States Census, 1860," index, FamilySearch (https://familysearch.org/pal:/MM9.1.1/MXFP-821 : accessed 10 Nov 2014), John P Gray in household of Young E Gray, Precinct No 3, Robertson, Texas, United States; from "1860 U.S. Federal Census - Population," Fold3.com; p. 51, household ID 372, NARA microfilm publication M653; NARA microfilm publication M653. National Archives and Records Administration, Washington, D.C.; FHL microfilm 805303.