We find the remaining journey cloth in Eder Gira, and go through the journey door in Eder Kemo to collect the fourth and final pillar. Then we check that Bahro linking stone in Eder Gira that I skipped previously.
Interesting, you may be right. It certainly makes sense to me that it would be Sharper's hat because of the hunting in Africa stuff in his journal, as I said in the video. If he has indeed been in Eder Kemo/Gira, it increases the possibility that it's his.
While you cannot turn the lantern on, you can grab the journey cloth without turning it on. That's how I did it because I never figured out how to turn the lamp on.
I don't know if you ever check these comments any more, but I wanted to say thanks for making this series of walkthroughs. I've used them many times over the years. I also wanted to note for anyone tries to play Eder Gira on the Gehn shard, that you are correct in believing that the games physics will not allow you to use the fish traps as bridges. Incredibly frustrating. This bug has apparently been noted for years but not fixed. Luckily, there's a workaround: if you exit out of the game and re-enter, the fish traps will work again. (I'm pretty sure they become bigger the second time around.) Also, I'm not sure there's really much point to playing on the Gehn shard nowadays. It only has a few fan ages, and I think all of those are now on MOULA and/or the Deep Island shard. (I haven't downloaded Deep Island yet, because the instructions make the installation sound a little complicated, but I hope to take the dive soon.) Happy explorations, all!
@mimkyodar You don't return them to the same place they originally came from. The implication Yeesha makes is that moving the pillars frees a Bahro (or returns it to D'ni, or something), though it's never fully explained.