I was going to head off to bed, but this cover I picked up tonight has really caught my attention.

First it's from the First Canadian National Philatelic Exhibition in 1937.
It was mailed by the President of the Toronto District Unit of the Canadian Philatelic Society, Herbert Buckland.
The addressee was Dr. E.G. Mason of Calgary. Internet searches show he was a member of the Calgary Philatelic Club, and there's an award at the club now in his name.
Further searches show he was the the only physician to command a Canadian Army battalion (the 50th) in WWI. He was gassed and left his unit before his battalion captured the two highest peaks on Vimy Ridge (Hills 120, 145) in April 1917. The Vimy Memorial now stands on
Hill 145.
He was also one of the first four members of the Alberta Eugenics Board in the 1920s. Eugenics was an idea the government should be allowed to sterilize anyone they felt was of inferior racial stock. Native Canadians were a favourite target. More interesting reading can be found at
http://en.wikipedia.org/wiki/Albert...genics_BoardSo much history on one little envelope! I'll have to google more tomorrow.