what is this, an art history lesson?

He could see the way she looked at the book, to him, and back again. Clearly intrigued. He wondered what exactly it was she was looking for. The Carpathius steel was a valuable resource within the Hallows. A sword one could only acquire through the Aegis’ grace.

Mercury watched the young pup carefully as she moved closer to the sword racks, and walked down them. He got to his paws, his body angled lightly on the balls of his paws in a sort of relaxed-ready state. Where he could grab the girl in a quick motion if it was required. For example, if she decided to lean forward and touch a sword, and potentially knock a rack over and endanger herself.

Then she stopped before a sword with the watery-steel pattern and he came up behind her. He reached over and pulled down the sword, pulling it to her eye height, but a distance away. A warning in his eyes. He would not be responsible for a pup injuring themselves. It was clear, despite her lack of words, that she wished to learn more about these swords. “The Carpathius Steel was discovered by Artorias, in this very Castle. The blades like these have yet to be seen anywhere else in Auster, which is how they got their name.”

"Speech"