In To Build a Fire in Jack London's 1908 story of life in the winter in the Yukon the author talks about the extreme dangers of hiking alone at -59 degrees centigrade and the difficulty of lighting a fire to warm up. Historically, it would be about just after the gold rush of 1898 in the Yukon in which many ill-prepared men came from warmer climes (like Sam McGee of Plumtree Tennessee) and perished due to lack of respect for the harsh winter conditions.
According to Douglass, laws in the south prove that slaves are human beings in those laws passed in the south punish slaves as punish white men. Douglass used the reference of the laws passed in the southern state of Virginia.