The only problem is that only the South Branch (sort of) flows north. The main course, if anything, heads south. I grew up in Eugene, OR, at the headwaters of the Willamette, which really does flow north. But I don't recall any of my high school chums telling me about the Willamette and the Nile.
How did Saint Margaret of Scotland die? Margaret died on November 16, 1093, at Edinburgh Castle, Scotland, four days after her husband and son died in defense of the castle. Edit
A storm however drove their ship to Scotland, where Malcolm III received the party under his protection, subsequently taking Margaret to wife. This event had been delayed for a while by Margaret's desire to enter religion, but it took place some time between 1067 and 1070.