Stephen Longstroth Richards, George F. Richards’s half-brother, was born on 29 July 1853 in Salt Lake City, Utah Territory, to Willard Richards and Nanny Longstroth. He married Emma Louise (Lou) Stayner on 15 August 1878. The two owned a farm in Mendon, Utah, before Stephen decided to study medicine and became a doctor in Salt Lake City. He died on 5 July 1922.
 Stephen Longstroth Richards, death certificate, 5 July 1922, “Utah Death Certificates, 1904–1964,” database with images, FamilySearch, https://www.familysearch.org/ark:/61903/3:1:S3HT-DYS3-CL2?i=625&cc=1747615; “Death Mourned,” Deseret News, 16 Sept. 1937, ; Flora Culture Garden Club, Living Memorial Honoring the Old Pioneers of Sugar House (Salt Lake City: Flora Culture Garden Club, 1966); “Emma Louise Stayner” https://ancestors.familysearch.org/en/KWNV-BJN/emma-louise-stayner-1857-1937.