"Why are these walls so low? Why aren't they made of stone?" Golinny asked, pointing at the low walls at the edge of the oasis.
"Sir Knight, our entire Cambridge Oasis covers roughly ten hectares, so building a stone wall is simply impossible! There are no stones in the desert, so we build walls using a mixture of loess and water, compacted with sandworms to form breastworks. After baking in the scorching sun, the loess becomes very hard!" the master of the house questioned, and the captain of the mid-squad, Piero, certainly did not dare to neglect his response, "However, these loess walls have a height limit, they can only be reinforced to about four meters. Any higher and there's a risk of collapse."
