I was listening to CBC 1 - a discussion about gold. I learned about Operation Fish. During the Second World War, Churchill ordered Britain's gold reserves as well as negotiable securities to be packed into crates and shipped to Canada, despite the danger of U-boats. It arrived in Halifax and from there the securities travelled here. They were stored in vaults below the Sunlife Building while the gold was stored in Ottawa at the Bank of Canada. In this way Britain was able to sell securities to pay for the war effort (the US liked to be paid - no armaments on credit!).
I shudder to think what would have happened if one of those ships had been torpedoed. You can learn more about the Sunlife Building here.