In Assassin's Creed Valhalla, you may come across Rigsogur Fragments, which are a type of collectibles in the game. On this page of the guide, you will learn where to find the collectible and how to reach it. This will make it easier for you to max out the Suthsexe region.
The tenth page can be found in Croindene.
The fragment is located in the building, on the upper floor. You can reach it by climbing the column. You shouldn't be bothered by any opponents while exploring - obtaining the treasure will be easy.
From the beams holding the ceiling, you have to drop down to the floor and then reach the table where the Rigsogur fragment lies. Once you grab it, it will go into your inventory.