I was re-re-reading (!) a Jon's chapter in aDwD when he goes to Mole's Town and on his way Jon notices three trees that have been carved in with human faces by the wildlings. Of course (that's the whole point of my third reading after all), I wondered if there wasn't any typical GRMM hidden meaning behind this Ash, Chestnut and Oak (their order of appearance). It's something I have not seen being discussed here (I missed it if it has) and would welcome any further analysis from the Forum's