Source: Bruce Remembers during follow up research re. Dobson. Several Dobsons in the 18th Battalion and the nature of the relationship are probably siblings.
008281/23 (Bruce Co) Earl Alvin DOBSON, 28, civil servant, Southampton, Wiarton, s/o George T. DOBSON (b. Southampton Ont) & Catherine HUNT, married Rachel Mary CASE, 28, nurse, Moosejaw, Wiarton, d/o Joseph CASE (b. Blanchard Ont) & Hannah COLLISON, witn: J.C. CASE of Owen Sound & Leonard E. DOBSON of Wiarton, 27 June 1923, Wiarton
Link: http://homepages.rootsweb.ancestry.com/~maryc/bruce1923.htm
History of the 18th Battalion CEF, "The Fighting Eighteenth" 