This file is indeed The Walls of Anon which connect to The City of Anon, (I assume Yaegar named it after another builder who was named Anon, or maybe he just made it up and there is also person with that name, as does happen). I was working on a project to restore original areas and was collecting them until my project got trapped on a corrupted hard drive. But, I started fresh and am working on it, off and on, once again. I am also trying to convert the files to Smaug base. I am using the only Smaug I could get to compile in MSVC, (it is a 1.4 version with a modified vcproj file in it). I will upload the files.

Well, only one of the files was approved. Unfortunately I do not have a Smaug version of the city to upload.

I found a smaug version. I forgot I converted some from rom to smaug. Now we have the full city on here.