In the late 1840s, Representative Abraham Lincoln resided at Mrs. Sprigg's boardinghouse on Capitol Hill. Known as Abolition House, Mrs. Sprigg's hosted lively dinner-table debates of antislavery politics by the congressional boarders. The unusually rapid turnover in the enslaved staff suggested that there were frequent escapes north to freedom from Abolition House, likely a cog in the underground railroad. These early years in Washington proved formative...