Special election to fill vacancy caused by the death of Samuel Ralston on October 14, 1925. Arthur Robinson was initially appointed to the seat on October 20, 1925.
Source for Popular Vote data: Indiana Legislative Bureau. Year Book of the State of Indiana for the Year 1926, Indiana Legislative Bureau (https://babel.hathitrust.org/cgi/pt?id=uc1.b3002045&view=1up&seq=36) (accessed 17 Oct 2023)