Is your friend suggesting that you were the one who wrote this inscription? You find that idea a bit hard to swallow. Still, your friends are always babbling about time travel...
You always thought this inscription was written to your poppop by his nanna, who was your great great grandmother, founder of the corporation you'll inherit in a few years. The message has always been a fascinating mystery to you, and probably was to him as well. From the way it's written, it seems it was intended for him to receive after her death. She talks about a journey he is supposedly meant to go on. You wonder if that adventure ever took place, or if the note was just one last jape by an old woman from a proud family of pranksters? She goes on about many fantastical sounding things he supposedly would have found on this journey, like agents, exiles, underlings, denizens, and heirs of breath and seers of light and stuff like that. Wait... didn't your friend mention those too?
In any case, this message to poppop from his sweet old nanna is the best evidence you have to dispute all this evil batterwitch nonsense. She clearly cared for her grandson very much, and would never start a company responsible for the things it's accused of, let alone be alive today to perpetrate them. But then, what if she wasn't the one who wrote it? This thought makes you very nervous.
You suddenly remember your dream. What did it mean? You should talk to Jake about all this.