Analysis of information sources in references of the Wikipedia article "Robert Ross (British Army officer)" in English language version.
Their names do not pop up until the 1850s, when a political movement bent on keeping immigrants in general and Catholics in particular out of positions of power resurrected their memory.
we could easily have at our mercy the capital
Cockburn, who accompanied Ross into the capital, reportedly wanted to burn the entire city in retaliation for American depredations in Canada. But it was an army operation and Ross' call, and he would have none of it.