Benjamin was born in 1837.
"United States Census, 1900," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MS9K-BL7 : accessed 27 December 2019), Benjamin T Richmond, Groveland township, Oakland, Michigan, United States; citing enumeration district (ED) 86, sheet 8A, family 189, NARA microfilm publication T623 (Washington, D.C.: National Archives and Records Administration, 1972.); FHL microfilm 1,240,735.
Have you taken a DNA test? If so, login to add it. If not, see our friends at Ancestry DNA.