This passage has punctuation mistakes. I'll try to correct them all. Just have a look on this: Buddy Rich has appeared in Hollywood films "Symphony of Swing" (1939), "Ship Ahoy" (1942), Louis Armstrong "How’s About It" (1943).
The trade in beaver pelts had been the centre of Canada's economy from the early 17th century to the early 19th century. Based on the history, the beaver is the national symbol of Canada.
