Grimrock

Aww I hoped it was something I haven't found already, the big weird looking thing in the top-right should have given me the hint. Thanks alot anyway!

I'm not stuck or anything, just a question I can't answer for myself. I found a note lying on the ground in Level 4 (Beast Garden & Menagerie, accessable through the north-west teleporter) which i will provide a picture of at the end of my post. I found a similar note a few levels deeper on an e...