still awake as the big house encasing the two of themitself an assemblage of mainly organic compounds surrounding and embracing the two humans bodies of mainly organic compoundsas the big house settled toward a nights stasis , its strong beams and headers and wood and gypsum skin giving back the warmth theyd absorbed through a day long with solar heat in a kind of sigh of its own , low groans and creaks like some large animal trying to get comfortable before sleep .