1691. When I inquired who they were, they were unwilling to speak; it was said they did not speak willingly, and when driven to it that they were still averse, saying that thus it would be detected of what quality they were. I perceived that those were of this character who constituted the province of the dura mater, which is a common integument, or rather a substratum, in the brain, of those things which are celestial and spiritual; for although the dura mater is extended over, and thus appears above, yet it is not overlaid but underlaid in respect to those things, since it comprises [tenet] the exteriors of the brain, while spiritual and celestial things [occupy] the interiors.