We are gnomes afterall. Talking is in our blood.
If you are interested in reading more there's Ludvig Holberg's proto-scifi satiric tale Niels Klim's Underground Travels.
http://publicdomainreview.org/2011/10/10/stories-of-a-hollow-earth/
Here's also a book that may be of interest.
Well we do have this. You probably noticed this, I'm just putting this here to refresh your memory.Thanks, Bro. I grabbed the images in that post from the publicdomainreview site, because I couldn't find them elsewhere. I'm worried that looking too much into other things will derail the setting out of "Arcanum", it's unfortunate that Troika never released any solid information on how they planned to do the proposed "Journey to the Centre of Arcanum" sequel.
"The sequel was based loosely on Jules Verne's A Journey to the Center of the Earth, where we planned to continue the adventures of the great explorer Franklin Payne. He has disappeared into the bowels of the earth, and his wife has hired you to find him. We had laid out most the storyline, and it included finding prehistoric monsters, subterranean humanoids, and most thrilling of all, an ancient civilization of raccoon's. Of course, none of this came to be, but our talks about using the Source engine led to our making Vampire: Bloodlines."