Ontario

An estimated 30,000 to 40,000 freedom seekers entered Canada during the last decades of enslavement in the United States. During the period of 1850 to 1860, between 15,000 and 20,000 fugitives made it to Upper Canada (later called Ontario), which would become the main terminus of the Underground Railroad. The newcomers migrated to various parts of what is now Ontario, including Niagara Falls, Buxton, Chatham, Owen Sound, Windsor, Hamilton, Brantford, London, Oakville and Toronto. During this mass migration, Black Canadians contributed significantly to building strong communities and to developing the provinces in which they lived and worked.

Source https://www.bac-lac.gc.ca/eng/discover/immigration/history-ethnic-cultural/Pages/blacks.aspx

Question 3: Who was the first Black letter carrier in Canada?