"Most that I have done and suffered in the service of our cause has been in public, and I have received much encouragement at every step of the way. You, on the other hand, have labored in a private way. I have wrought in the day—you in the night. ... The midnight sky and the silent stars have been the witnesses of your devotion to freedom and of your heroism." Fredrick Douglass letter to Harriet Tubman