I was intrigued by the references Grindelwald made, and I have to confess, I had to look a couple of them up but when he said, "Call me Ishmael", I had to laugh (and I was sure of who it was). He's clever and cheeky and could give Sirius a run for his money. I love how you've snuck him, and young Dumbledore, in.

*goes off to read the next chapter*