Here is some information related to the forthcoming scenario Out of the Darkness.
First, here's an old map drawn with charcoal on some kind of hide. To where might it lead?
Next, here's some information about the Futhark alphabet, the runes of which, some say, can be used for magical inscriptions.
Finally, I've added a couple of books to my Appendix N for Treasure Hunter Adventures, ones that deal with the Vikings and their exploration of North America.