Portal on Andrews University Seminary Studies website (if URL for PDF doesn't take you anywhere): http://digitalcommons.andrews.edu/auss/vol8/iss2/2/.
Erwin R. Gane. "Luther's Views of Church and State," Andrews University Seminary Studies 8.2 (1970): 120-43 . https://www.andrews.edu/library/car/cardigital/Periodicals/AUSS/1970-2/1970-2-02.pdf
Picture of John Armstrong and unidentified woman (wife Caroline?) on Illinois Ancestors Presents Menard County website at http://www.illinoisancestors.org/menard/1872bios/pg55a.html -- -- It appears to be from a centennial history booklet called They Left Their Mark In Oakford, 1872 Also pictures of Oakford, including a Fourth of July celebration that Armstrong helped organize. Details at:
Jeanie Lowe, Illinois Ancestors Presents Menard County http://www.illinoisancestors.org/menard/: "My name is Jeanie Lowe and I'm your host for Menard County. Janine Crandell is the webmaster and performs the updates to the site. We're a volunteer organization whose mission is to provide free genealogical data for all researchers. ...