You came a long way. Through the library, the laboratory,
the corridor and its loops,
the archive and its secrets,
the garden and its impossible plants,
the basement and its deepest room,
the observatory and its signal,
the letters and their ash,
the cipher and its key. You stayed. Most people don't stay. Most people exit the corridor immediately. They feel the slight discomfort, the sense that something is watching, and they put down what they're reading. You didn't. That means something. I don't know what it means for you specifically. I only know what it meant for me: that I was the kind of person the corridor had been waiting for. A noticer. A follower of threads. Someone who asks "what's at the end?" and then walks until they find out. The end is this: there is no end. There is only the next question.
Which you already have.
I can tell by the fact that you're still reading.