The correct answer to this open question is the following.
Unfortunately, you did not attach the map. Without the map, we do not know what is its content. Just you know.
However, trying to help you, we can comment on the following based on our knowledge of the topic.
The region where the Underground Railroad maintained safe houses was Michigan.
Let's remember that the Underground Railroad was not a railroad per se, but a group of people that helped crossed the southern lines to the Northern states, so slaves could escape from the tyranny of the owners of the large plantations of the South. It was the Quakers in the 1800s who started to form this group and helped slaves to escape.
On the other hand, Dred and Harriet Scott were two black slaves that sued for their liberty in the 1840s, claiming they had lived in a free territory. The Supreme Court decision or better known as the Dred Scott decision infuriated many people in the North and was one of the reasons for the beginning of the American Civil War.
