Egeria was a nymph attributed a legendary role in the early history of Rome. According to mythology she counselled and guided King Numa Pompilius (Latin numen designates "the expressed will of a deity") in the establishment of the original framework of laws and rituals of Rome. Numa is reputed to have written down the teachings of Egeria in "sacred books" that he had buried with him. When a chance accident brought them back to light some 500 years later, the Senate deemed them inappropriate for disclosure to the people, and ordered their destruction.
My head-canon is that Numa had a tulpa/succubus that he succesfully summoned using techniques from /x/ and his book was just a diary of his wetdreams and erotic experiences with said daemonl; maybe it contains the secrets to summoning said succubae. What do you think were in the books? St Augustine comments on them
"let it suffice to suggest that the causes of those sacred things which were written down by King Numa Pompilius, the institutor of the Roman rites, ought never to have become known to people or senate, or even to the priests themselves; and also that Numa himself attained to these secrets of demons by an illicit curiosity, in order that he might write them down, so as to be able, by reading, to be reminded of them. However, though he was king, and had no cause tobe afraid of any one, he neither dared to teach them to any one, nor to destroy them by obliteration, or any other form of destruction. Therefore, because he was unwilling that any one should know them, lest men should be taught infamous things, and because he was afraid to violate them, lest he should enrage the demons against himself, he buried them in what he thought a safe place, believing that a plough could not approach his sepulchre."
My head-canon is that Numa had a tulpa/succubus that he succesfully summoned using techniques from /x/ and his book was just a diary of his wetdreams and erotic experiences with said daemonl; maybe it contains the secrets to summoning said succubae. What do you think were in the books? St Augustine comments on them
"let it suffice to suggest that the causes of those sacred things which were written down by King Numa Pompilius, the institutor of the Roman rites, ought never to have become known to people or senate, or even to the priests themselves; and also that Numa himself attained to these secrets of demons by an illicit curiosity, in order that he might write them down, so as to be able, by reading, to be reminded of them. However, though he was king, and had no cause tobe afraid of any one, he neither dared to teach them to any one, nor to destroy them by obliteration, or any other form of destruction. Therefore, because he was unwilling that any one should know them, lest men should be taught infamous things, and because he was afraid to violate them, lest he should enrage the demons against himself, he buried them in what he thought a safe place, believing that a plough could not approach his sepulchre."