This was a measure that the Bank of Canada did to inject liquidity into the market, so they purchased Government of Canada bonds off the market. Those Government of Canada bonds were not retired; they're still out there. So when you consolidate and pick up the Bank of Canada and put it into the government, you can't hold your own assets so you need to have an accounting treatment to eliminate those assets.
They purchased the bonds at a value that was higher than what they were issued at, to the tune of $19 billion, and that then is recorded as an expense in the government's financial statements. It's to recognize that the value of the bonds had increased since their issuance and in order to buy them back, you needed to pay a premium on them.
I invite the Department of Finance perhaps to add, or do you have a follow-up question?