Hello - I'm not following any of your family lines, but stumbled upon something that may be relevant for you (or not) while searching some St. Mary's (Perth Co.), Ontario information about St. Mary's area soldiers in World War I. On one of the Ancestors at Rest web pages, St. Mary's and Surrounding Country Soldiers in WWI, is a scanned image from a St. Mary's newspaper page listing the area men who served in WWI. The list of transcribe names follows the image, as it is not readable. In the list is: "Du[hu]age, Capt. F. W." which _could_ be a mis-transciption of the name of one of the sons of your James and Mary Jane Rutherford Delmage. The web page is:
http://ancestorsatrest.com/perth_county_ontario/st.marys-sol...If you suspect there is a link to one of your family line and wish to check the Canadian Archives records for WWI enlistments, the address to search military records is:
http://www.collectionscanada.gc.ca/genealogy/022-909.006-e.h...Be aware that there are mis-spellings/mis-transcriptions in the Canadian Archives database due to the "interesting" handwriting on the records, I suspect.
Sincerely, Jean E. DeLauche