The 1860 census includes Green Flake's family.

Date: Aug 14, 1860
Type: Government Document
Source: E. D. Rich
Non-LDS
Hearsay: Direct
Reference: Green Flake's Family in the 1860 US Census, 1860, familysearch.org
Scribe/Publisher: United States Census Bureau
People: E. D. Rich
Audience: Reading Public
Transcription: Green Flake
Martha
Lucinda
Abram G.
Source Link: https://www.familysearch.org/ark:/61903/3:1:33SQ-GBSF-9CR1?view=index&personArk=%2Fark%3A%2F61903%2F1%3A1%3AMH2W-GVZ&action=view
Citations in Mormonr Qnas: Slavery in Utah
Black Saints and the Priesthood (Brigham Young/Early Utah era)
Black Saints and the Priesthood (1895–1978)