Nightmare level 2. Code for the cabinet under the raven. Have tried all combos for the number of nails..

The code for the raven cabinet isn't from the nails on the walls. In the cabinet there is a box with a puzzle which you can get a cup from. On the side of the cup is a recipe for a polishing paste and the ingredients can be found in the room, (and there's a shovel next to the fireplace and I missed that entirely). After you make the paste, you can polish the spoons which will give you the answer.

The combination for the lock can be found in the middle drawer. You’ll have to do some cleaning before the numbers can be read.