Larian Studios Forums Beyond Divinity (English) Help/Tips/Tricks Missing Act IV Chest Keys

I'm missing a couple of keys for locked chests in act IV, can anybody tell me where they are?

1st, in Pipes level 2, there is a locked stone chest?

2nd, in Accedemy level 3, Cave Ghost Labrynth trial, there is a laboratory. I have opened the door by lighting the candle and getting a siver key. Inside are 3 chests, but none of the other 3 keys I have found in the level open the left chest?

If anybody can point me in the right direction, it would be appreciated?

Key for the stone chest (Be prepared for a long walk!)
First, go to Academy level 4 and pick up the wooden key (nr 11). Then go to Academy level 3 and use it to open the wooden chest and pick up the stone key. Use the stone key in level 2 pipes to open the stone chest, where you find the silver key. Use the silver key in Academy level 2 to open the silver chest, and finally use the golden key you find there to open the golden chest in Academy level 4 (BF key level 5).
If you have any trouble finding the chests, you can follow the links from nr 11 Academy level 4.

As far as I know that chest in Labyrinth cannot be opened (case for lockpick?).

Thanks Desdemona