Look at each stone - it gives a hint of what color it is.
There's also a "brown" stone, though it looks like dark yellow.

Thank you very much!

Hello, everybody! Could you please give me a hint. I found the trapdoor and got into the laboratory. I left the laboratory, but I can't close the trapdoor. Is there a way to close it? I clicked the trapdoor ("just walk there"), I clicked the bookshelf (books cycle) I'm sure it should be qu...

Actually, I'd read all manuals and FACS before playing =) How couldn't I notice this talk option I don't know. It's like "we see just what we expect to see" =) Erpy ..but may be you should take error input of "asking" and check if it's valid input for "telling" in game ...

Schrijvertje, thanks!

I think it should be outlined that you can click talk on your hero!
Thanks!

After Aziza 's question "shall we share tea?" I tell her "yes" , but she answers "I believe I asked you a question, young man" I tried different answers like "of course" , "surely" and "no" I tried to buy tea servers at fountain plaza, but ...