Background
He was born in Trafalgar Township, Canada West becoming a lumber merchant and manager.
He was born in Trafalgar Township, Canada West becoming a lumber merchant and manager.
Munn attended school at Otterville, Ontario.
He became a councillor for the city of Orillia, Ontario for two years. He was defeated by Ernest Crawford Carson in the 1928 provincial election. He was first elected to Parliament at the Vancouver North riding in the 1930 general election.
After serving only one term, the 17th Canadian Parliament, he was defeated by Charles Grant MacNeil of the Company-operative Commonwealth Federation in the 1935 election.
He moved to British Columbia and entered provincial politics there, becoming a Liberal member of the legislature at the Lillooet riding in the 1924 provincial election.