Greetings;
My apologies, but the Tunnels & Trolls Treasury is offline for the time being. It was an ancient example of HTML engineering and desperately needed bulldozing for a neighborhood beautification project. If there is a great hue & cry (whatever the heck that means), I may bring the material back as a series of PDF books.
Meanwhile, please have a look at the free floorplans I've made for use with your game. I hope they'll make up, at least temporarily, for the disappearance of the treasury.
Hop on over to the Strontium Gaming site.
Meanwhile, have fun!