So, if a "real" scientist would be looking for rare fish, what would she do? Catch them, take pictures, collect information then publish the photos and findings.
Good example of how the computer industry worked at the start. People would buy a computer and then wonder what it is good for. No one upgraded or bought new until a "killer app" showed up. At one point it was Visicalc. In the 90's it was The Lion King Game.
Anesthetics do not work on me like everyone else. The last time the surgical crew thought I was "under" they were cracking jokes at my expense. A letter to the hospital returned a less than satisfying apology.
If they are build in a manner similar to England's Dry Stone Walls, then the "mortar" is limestone chips and dust placed between the inner and outer walls. With almost constant moisture, it degraded over time and turned into something like mortar.
It is not that bad. The more horrendous parts of the Holocaust are only hinted at. Unless you are imbued with Holocaust folklore, you will miss quite a few of them.
Brother is a Latin scholar. He frequently has been asked to translate mottoes into Latin. Most of them turn out as well as North Carolina's. I forgive them.