The discovery that this was a dummy, and that the bed was clamped to the floor, instantly gave rise to the suspicion that the rope was there as a bridge for something passing through the hole and coming to the bed.
Al descubrir que no tenía campanilla, y que la cama estaba clavada al suelo, empecé a sospechar que el cordón pudiera servir de puente para que algo entrara por el agujero y llegara a la cama.