Something goes click in Harrow's head, and she makes a decision.

"I have one other mystery. It may not be anything important, but it... vexes me." She flips through her journal. "After the second experiment, I had to wear Gideon's overcloak back to our room. I found something in her pocket, a scrap of paper she had removed from the first study without showing me."

She finds what she is looking for, copied painstakingly in clear rather than coded.



"The reason why seems obvious. The initials of the Second House pair who shared that study ten thousand years ago were G and P."