Horse and Eagle are easy, following the journal.
The other 2 ar in the right side. You have to see the symbol on the floor that appears depending of where you are. So, you got to the lion portal, for example, and look the black square having Drake in front, back, left and right of the square. It will give you 4 different symbols (the ones that are down-up-left-right of where the lion symbol has to be). Then, look in the grid searchin for that pattern. Repeat with the cow.
In reality, you only need to look front and back to find the unique pattern in the map. In the left of the area, you have it also for the eagle. Is not necessary (the position is in the journal), but is there to help to understand the puzzle.