In the course of their next two or three meetings he frequently repeated this little act of vengeance. It was simple and, since both Helmholtz and the Savage were dreadfully pained by the shattering and defilement of a favourite poetic crystal, extremely effective. In the end, Helmholtz threatened to kick him out of the room if he dared to interrupt again. And yet, strangely enough, the next interruption, the most disgraceful of all, came from Helmholtz himself.