See Malachi 3:1; Book of Mormon, 1830 ed., 503 [3 Nephi 24:1]; Revelation, 9 Dec. 1830 [D&C 36:8]; and Revelation, 3 Nov. 1831 [D&C 133:2].
Probably Robert Stone, a sixty-seven-year-old barber and high priest living in Nauvoo. (Platt, Nauvoo, 91; 1850 U.S. Census, Nauvoo, Hancock Co., IL, 400; “Names of Members of the High Priests Quorum,” in Nauvoo High Priests Quorum, Record, CHL.)
Platt, Lyman De. Nauvoo: Early Mormon Records Series, 1839–1846. Vol. 1. Highland, UT, 1980.
Census (U.S.) / U.S. Bureau of the Census. Population Schedules. Microfilm. FHL.
Nauvoo High Priests Quorum. Record, 1840–1891. CHL. CR 1000 2.