Tartan historians: I was wondering if anyone could give me background on the Old Clan Bruce tartan. You don't see it much, except in pictures, but can anyone give me a history on it, and maybe why it fell by the wayside?

Also, I was wondering if anyone knew anything about New Bruce tartan... it's also known as a Grant (and Drummond?) tartan. How did the Bruce name get affixed to it?

Thanks!
The Bruce