There are some spirits, or troops of spirits, who wander around, periodically arriving back at the same places. [I was told] that souls and spirits are extremely afraid of them, for they torment them with a certain kind of torture. I was afterwards instructed that these are they who portray the inner basal lining or upper part of the bladder in general, that is, the parts which there insert into the bladder, such as the umbilical ligaments, the muscles, the nerves, which spread out from there and come together towards its sphincter. These same ones who were with me today, therefore, are those who relate to the sphincter of the neck [of the bladder], or the entrance to the urethra; for their torture is like strangury, and indeed, from the beginning even to the outlet of the urethra.