I've just finished this and I have to say I think it's great - very atmospheric, skilfully written in authentic Lovecraftian style, a good solid plot (I like a strong narrative in a game) and very solidly implemented throughout. I'd heard of TAB but never played anything written in it. Judging by this, it's a very capable retro-style text adventure tool; the game feels very PAW-like to me.
I spotted one or two little errors and typos - I'll DM you with those.
Well done!