MONDAY: T for 2: Camelia Hawkshot, Library

Camelia Hawkshot, Eaglesclaw Head Librarian

I found this strange sequence of numbers carved into one of the bookcases that I can’t understand. Can you try to figure out what it says? the Ancient Runes professor in the Larder might know where to start.”

20-8-5-9-18
23-15-18-4-19
9-14-19-16-9-18-5
13-5