found: Library of Congress Manuscript Division for Shellenberger, John K. Letters of John K. Shellenberger, 1862-1913(Opdycke, Emerson; Civil War army officer)
found: In memoriam, Emerson Opdycke, 1884?:p. 1 (b. 1830, d. 1884)
found: Opdycke's Tigers in the Civil War, 2018:ECIP galley (Emerson Opdycke; appointed Lieutenant Colonel of the 125th Ohio Infantry; promoted to brigadier general)
found: Wikipedia, Mar. 18, 2019:Emerson Opdycke page (Samuel Emerson Opdycke; Jan. 7, 1830-April 25, 1884; businessman and Union Army brigadier general during the American Civil War)