Letter signed Leonard Helm, Fort Jefferson, to George Rogers Clark, February 14, 1781, A0289-00392. Missouri Historical Society Library and Research Center.

Letter signed Leonard Helm, Fort Jefferson, to George Rogers Clark, February 14, 1781, A0289-00392. Missouri Historical Society Library and Research Center. https://mohistory.mobiusconsortium.org/repositories/2/digital_objects/12202 Accessed November 24, 2024.