The Underground Railroad was not underground. Because _____________ and the people who helped them were technically breaking the law, they had to _______________. They went “underground” in terms of ___________ their actions. Sometimes they even hid in unusual places. Many clever and creative ideas helped slaves during their escape. When abolitionist ( 废奴主义者) John Fairfield needed to sneak (偷偷摸摸地进行) ______ slaves over the roads near Cincinnati, he hired a hearse (灵车) and __________ the group as a funeral procession. Henry “Box” Brown, a slave, had himself shipped from Richmond to Philadelphia in a ____________. The routes the slaves traveled appear in this map. The trip is ______ miles (900 kilometers) long. A strong, lucky runaway might have made it to _________ in two months. For others, especially in bad weather, the trek ( 跋涉) might have lasted a ________.