I have a photo of a Donald Gibson (great grandfather) with a Bill Barber taken at a photo studio in Toronto. It is hard to tell when the photo was taken. They are not children but maybe 18-22 years old and was taken before 1918 as that is the year Donald was killed. He was 27.
Donald grew up in Toronto living on MacMillan Avenue as a baby and then for many years at 31 Birch Avenue.
As there are many William Barbers I do not know which is the correct one. They must have been good friends (relatives?) to have gone to a photo studio to have their photo taken together.
If anyone recognizes any of this information and knows who Bill Barber is I would love to hear from you.