More information
After the following morning's spell flurry you will have a little more info. Josefus, Kelust and Parvis blow a bunch of spells and come up with a little bit more.
First of all, the wizard that last occupied White Plume Mountain was named Keraptis. He was a power hungry individual but didn't like the responsibility of being a ruler. He had "greater things" he wanted to accomplish and claimed White Plume Mountain as his abode. It was out of the way near a great swamp. This did not prevent Keraptis from occasionally reappearing and terrorizing cities and towns. He would inflict evil and harm in an effort to intimidate people, take what he wanted and then leave. All too often, this taking involved people that were never heard from again. But Keraptis hasn't been seen or heard from by credible sources for a couple of centuries. There are unconfirmed rumors about him up until a bit more than a century ago. But nothing since then.
Aside from several stories about how he terrorized various towns and cities, there are a few impressive stories regarding him as well.
Shortly after claiming White Plume Mountain as his own, a huge black dragon flew out of the swamp. Paludeterrore demanded immediate subservience from Keraptis. Instead Keraptis spoke arcane words of power that hurt and infuriated the dragon. Belching forth a tremendous gout of acid, the dragon was surprised that Keraptis didn't even flinch. While such an attack on common creatures was always devastating, against a powerful wizard, it was less effective. The dragon was even more surprised when an unseen force grasped it in midair and held it there. After that, Keraptis destroyed the dragon with a variety of magic.
Basic divinations seem to indicate that Keraptis is no longer alive.
Secondly, White Plume Mountain is a strange conical mountain near a swamp. It is only about 800 feet tall and the mountain is only about 1000 yards in diameter at the base. It's name is taken from the white plume that shoots nearly 300 feet into the sky from the top of the mountain. The geyser is nearly constant. It does fall off occassionaly, but not very often.
Parvis did a little further checking and found another scholar that indicates this is volcanic activity with a ready source of water. This area will have strong ties to elemental fire and water.
For most of it's existance, White Plume Mountain has been associated with devils and demons. Few people visit the mountain, but those that try rarely come back. They report it is a very hot, wet place. Lots of mud and hot water running down off the mountain. Very uncomfortable to be there. Where Keraptis moved into the area, he allegedly carved out one or more areas for his own use. Disappearances of explorers did not change with Keraptis' arrival. Most commoners considered him to be like a devil or demon himself, so the stories didn't change either. The only good thing coming from Keraptis' arrival was the death of Paludterrore.
Thirdly, the angel guardian on the path was assassinated. It was quite clearly done by Notaff Fellhand. Notaff was a famed assassin who allegedly sold his soul to the Hells. Rather than do this for more power, he did it to more effectively sow death and despair among the good people of the world. He is now a Hellish Infiltrator. In those terms, Josefus is less surprised at the angel's death.
More to be posted, but it is too late this evening.