Governor William Richards petitions for pardon – Blackman, Edward, https://drive.google.com/file/d/0B_YiJoTQNoYeS1RsTy1DbFdPaGc/view?usp=drive_link&resourcekey=0-Cc13s7BTaHjMXq_L6ZLcWw. Wyoming State Archives, Wyoming Cultural Resources Division, Wyoming Department of State Parks & Cultural Resources.

Governor William Richards petitions for pardon – Blackman, Edward, https://drive.google.com/file/d/0B_YiJoTQNoYeS1RsTy1DbFdPaGc/view?usp=drive_link&resourcekey=0-Cc13s7BTaHjMXq_L6ZLcWw. Wyoming State Archives, Wyoming Cultural Resources Division, Wyoming Department of State Parks & Cultural Resources. https://wyocomet.wyo.gov/repositories/2/digital_objects/2784 Accessed November 05, 2024.