This primary source comes from the Records of the Office of the Chief Signal Officer.
National Archives Identifier:
530951Full Citation: Colonel Theodore Roosevelt, 1st Cavalry, U.S.Volunteers; ca. 1898; Records of the Office of the Chief Signal Officer, Record Group 111. [Online Version, https://www.docsteach.org/documents/document/colonel-theodore-roosevelt-1st-cavalry-usvolunteers, May 12, 2024]