While in Durgan's battery, I found three key items, a sigil of Sword, a Sigil of Shield and an Iron Dial.

I pretty much found where they are supposed to go, the Hall of Rememberance in the second level of the Battery. I had no problem with the Sword and Shield but the game does not allow me to insert the dial in the third slot. I imagine that I either have to find a third Sigil, most likely the Sigil of the Helm, or  somehow turn the dial into a Sigil. Anyone have any ideas?

You have to find the Sigil of the Helm. 

 

Clear the whole level, then come back to Hall of Remembrance. 

 

That's how I did it. I did not even remember picking anything up, so it was a pleasant surprise to find out I had all three sigils by the time I reached the room.

I figured as much. Problem is I have already gone through the whole battery with a fine toothed comb and no sigil.

I am afraid that when I did the special interaction with the mine cart I went the wrong way and now I have lost it for good.

I got the helm, I've got the shield, where the hell did you find the sword?

I figured as much. Problem is I have already gone through the whole battery with a fine toothed comb and no sigil.

I am afraid that when I did the special interaction with the mine cart I went the wrong way and now I have lost it for good.

 

Did you go right? If you did, that was the right way. I went there too and got everything I needed.

Somehow, I managed to find the Sigil of the Helm in a place I had already checked. Go figure. When I finally inserted it in the slot, the lightning around the statue dissipated but nothing else happened. What is supposed to happen, and yes I inserted sword and shield too.

I cann't find sigil of sword. Where did you find it guys?

It's in the same level as the others, The Mines, in a hidden spot (you need to be in sneak to search for it) in the upper right corner of the Workshop in the scroll cabinet.

Somehow, I managed to find the Sigil of the Helm in a place I had already checked. Go figure. When I finally inserted it in the slot, the lightning around the statue dissipated but nothing else happened. What is supposed to happen, and yes I inserted sword and shield too.

Well, first make sure you put them in the right order (the shield should be by the dwarf statue with the shiny shield, for example). Then you should be able to pick up the mace at the end of the hall.

Cannot find sigil of Shield. Can someone give me exact location?

Found all three (thanks for the tip on the sigil of the sword) but what do they do?  Simply disable the traps?

Pretty much. On my first playthrough I only used 1 sigil, took the mace and some huge traps appeared where I didn't use the sigils. It's not a big deal, but helps a bit against the dwarven spirits, not directly ofc, but you don't need to worry about the traps.

 

Somehow, I managed to find the Sigil of the Helm in a place I had already checked. Go figure. When I finally inserted it in the slot, the lightning around the statue dissipated but nothing else happened. What is supposed to happen, and yes I inserted sword and shield too.

Well, first make sure you put them in the right order (the shield should be by the dwarf statue with the shiny shield, for example). Then you should be able to pick up the mace at the end of the hall.

 

 

That's all they do? I picked it up without having the sigils and had to fight my way through. And then, when I finally found all of the sigils, I kind of wondered what they did, since nothing seemed to happen.