Letter from William Whipper to William Still, December 4, 1871
written by William Whipper (1871); edited by William Still, 1821-1902; in The Underground Rail Road: a Record of Facts, Authentic Narratives, Letters, &c: Narrating the Hardships, Hair-breadth Escapes, and Death Struggles of the Slaves in Their Efforts for Freedom (Philadelphia, PA: Porter & Coates, 1872), 258-263