Okay, nice to see your progression !
The clues are specific words written in the larvae language (which is our alphabet but mixed with oghamic design). You can find words written in the larvae language in the descriptions, and they correspond to some puzzles. There is much more objects than puzzle, so you have to find the good ones. On each door of the tombs, there is an object drawn ( à jar, a hammer, etc) which is related to the object that you have to find to have the good word.