A few more tidbits. 1920 Federal Census, Wilder Rinehart age 52, Sarah 53, daughter Olive LOUGH 28 Widow living again in Brown Twp, Montgomery Co, Indiana
Olive's husband Herbert Harrison Lough born 25 Aug 1886, died 4 May 1919, Waveland, Montgomery CO, Indiana.
I found a WW1 draft record for a Earl DULEY Irwin, born 15 Oct 1878, On Sept 12, 1918, at the time of his registration for the draft he lived in Marion Co, Indiana, his wife was Hettie...now I don't know if this is yours or not, but I have a feeling it is..further searching I found a marriage record for Earl Irwin to Hettie Gibson, 31 July 1898, Marion CO, Indiana.
Hope this could help also, I haven't found anything on Dulcen Irwin Dye or Martha Irwin, do you have anything else on either of them? Such as parents, date of birth?