"Aside from the Starks and the Boltons, the most powerful Houses in the North are the Karstarks, the Manderlys and the Dustins." Davos gestured towards the map while explaining. As the former Hand of Stannis Baratheon, the Onion Knight was generally the best informed of the latest events. Sansa had been greatly isolated both in the Eyrie and Winterfell, only getting scraps of news, and Brienne had been on the road. The Night's Watch itself was probably the last place any news in Westeros arrived, so Jon himself knew little.