I'm trying to locate a scenario I remember reading a small bit about, but I am having no luck. It had something to do with a group of investigators travelling down a river (I believe it was the Nile, or a different river in Africa) and having an encounter with the Black Man form of Nyarlathotep. I vaguely remember elephants being involved in the scenario as well.
I'm currently running the Masks of Nyarlathotep campaign, and I might have read about this scenario in the companion book, but now I can't find the mention of it. Anyone know what I'm talking about, because Google seems to think I'm crazy.