Shortly after the release of the 1935 Series, King George V died rather
suddenly. His son, Prince Edward, the Prince of Wales (as seen on the 1935 $5
note) became King Edward VIII. New notes started into production, no doubt, with
King Edward VIII's portrait on some.King Edward abdicated the throne in December of 1936 so that he could marry
Wallis Simpson, a twice divorced American. His brother, the Duke of York (from
the 1935 $50 note), then became King George VI. As a matter of fact, it was the
same vignette from the 1935 $50 note that was used for the 1937 series.
The allegorical scenes were also reused but in some cases, used on different
denominations.
This was also the issue that the Bank of Canada chose to move to a bilingual
note as the cost of printing separate languages was too expensive. The note size
remained at 6 x 2 7/8 inches.