Jon Snow and John Snow. First map shows how far Jon Snow has traveled in the same amount of time it’s taken the Night King and his army to travel from Hardhome to Eastwatch. 2nd map is the markings of John Snow, the father of epidemiology. That was the map of an epidemic of cholera in London in the 19th century. First of its kind. The common factor is John Snow..😁 Meant it to be a fun question only