A news story in the latest Ancient Warfare mag pointed me at this:
https://www.cambridge.org/core/journals/antiquity/article/landscape-exploitation-and-middledistance-supply-of-mudbricks-for-the-carthaginian-rampart-of-qart-hadasht-spain/9B7434C82667976B0143EB3DC81386C2
Those who have experienced early childhood know that not all muds are created equal.
Or taste the same...