88. [88] I saw an infestation of Mohammedans by Christians in a certain city; from which infestation they could with difficulty be rescued. It was done by arts, of which there are many in the spiritual world. It was then seen that the city sank down in the middle part, and there was a wall made round about. But the sinking down was little, so that they could ascend and descend. Thus those who withdrew were transferred, and exempted from the infestations.