Rhea had hacked into several files within the database of the Tower Spirit without anyone's knowledge and had given August a treasure trove of information about several things.
Spells, General World Information, profiles of high ranked Sorcerers, information on the Discidii Association, information on First Rank Sorcery, insider info on the Brander Clan, and so on. August had to thank Great Sorcery Phelan for being such a knowledgeable person as he had just given him information he had gathered meticulously over the course of several centuries. He was truly grateful for the assistance.
Rhea's computing speed was indeed no joke as it was able to steal several huge amounts of data in a short period, but also have a huge enough storage capacity to store all of it.